Fits 1971-1996 Chevrolet Caprice and Impala.

Correct your suspension geometry and improve rear-end stability with QA1 Lower Adjustable Trailing Arms. These arms are engineered as a direct bolt-in replacement for the factory components on GM B-Body platforms, allowing for precise adjustment of both the wheelbase and pinion angle. This adjustability is critical for maintaining proper driveline alignment and centering wheels in the wheel well, especially on modified or lowered vehicles.

• Adjustable design allows for easy wheelbase and pinion angle fine-tuning
• Direct-fit, bolt-in installation replaces worn or non-adjustable factory arms
• Optimized for 1971-1996 Chevrolet Caprice and Impala applications
• High-strength construction for increased durability over OE stamped steel
• Made in the USA
• Manufacturer Part Number: 5201

The QA1 1844-137 weld-in tube adapter is an essential component for custom suspension fabrication, steering linkages, and chassis work. These adapters provide a professional-grade method for mounting rod ends to your tubing. Each piece is CNC machined to precise tolerances from high-strength chromoly steel, specifically selected for its excellent weldability and durability in performance applications.

Designed with a smooth finish for a clean fit, this adapter allows fabricators to create high-tolerance links without the need for specialized tapping tools. Simply weld the adapter into your 1-1/2 inch OD tubing to provide a secure, threaded housing for 5/8-18 RH rod ends.

• Manufacturer Part Number: 1844-137
• Material: Weldable chromoly steel
• Tubing Compatibility: 1-1/2" OD with .250" wall thickness
• Thread Size: 5/8"-18 Right Hand
• Construction: Precision CNC machined
• Finish: Smooth

Designed for custom fabrication, this QA1 weld-in tube adapter (MPN 1844-120) provides a precise method for mounting rod ends to structural tubing. Each adapter is CNC machined to tight tolerances from high-quality chromoly steel, ensuring excellent weldability and high strength for demanding suspension and steering applications. The smooth outer diameter allows for a seamless fit into 1" OD tubing with a .120" wall thickness.

• Precision CNC machined from weldable chromoly steel alloy
• Engineered for 1" OD tubing with a .120" wall thickness
• 1/2-20 internal Right Hand thread for standard rod end compatibility
• Smooth body design for clean weld-in installation
• Essential for custom suspension links, control arms, and steering components
• Manufacturer Part Number: 1844-120

QA1 weld-in tube adapters provide a heavy-duty solution for mounting rod ends to custom suspension links, control arms, and chassis components. CNC machined to precise tolerances from weldable chromoly steel, these adapters ensure high structural integrity and a clean fitment into your tubing. This smooth-style adapter (MPN 1844-119) is designed to be welded into 1-inch OD tubing with a .120-inch wall thickness, allowing for the use of 1/2-20 left-hand thread rod ends.

• Manufacturer Part Number: 1844-119
• Material: Chromoly steel for superior strength and weldability
• Thread Size: 1/2-20 LH (Left Hand)
• Tubing Fitment: 1" OD with .120" wall thickness
• Construction: CNC machined for exact concentricity and thread depth
• Application: Ideal for fabrication of trailing arms, 4-links, and steering components

The QA1 weld-in tube adapter (MPN 1844-113) provides a reliable, precision-engineered solution for mounting rod ends to suspension links, control arms, and custom chassis components. CNC machined to exacting tolerances from high-strength chromoly steel, this adapter is designed for superior weldability and durability in high-stress performance environments.

This smooth-body adapter is designed to fit 3/4-inch OD tubing with a .065-inch wall thickness, allowing fabricators to create custom-length linkages with a professional finish and secure thread engagement.

• Material: CNC-machined Chromoly steel
• Outer Diameter: 3/4" (Smooth finish)
• Thread Size: 3/8-24
• Thread Direction: Right Hand (RH)
• Wall Thickness Compatibility: .065"
• Manufacturer Part Number: 1844-113

This QA1 weld-in tube adapter (MPN 1844-112) provides a high-strength solution for attaching rod ends to custom suspension links, control arms, or steering components. CNC machined to precise tolerances from weldable chromoly steel, these adapters are designed for fabricators who require reliable, heavy-duty connections in demanding automotive environments.

Specifically engineered for 3/4-inch OD tubing with a 0.065-inch wall thickness, the smooth outer profile allows for easy insertion prior to welding. The internal threads are precision-cut to accept 3/8-24 left-hand threaded rod ends, making it ideal for creating adjustable linkages when paired with a right-hand thread counterpart.

• Manufacturer Part Number: 1844-112
• Material: Chromoly Steel Alloy
• Tubing OD: 3/4"
• Wall Thickness: 0.065"
• Thread Size: 3/8"-24
• Thread Direction: Left Hand (LH)
• Style: Smooth (Weld-In)

The QA1 1844-106 weld-in tube adapter provides a precise, reliable solution for integrating rod ends into custom suspension linkages, steering components, and chassis supports. These adapters are CNC machined to exacting tolerances from high-strength chromoly steel, specifically selected for its excellent weldability and durability in performance applications.

Designed with a smooth body for a clean fit, this adapter allows fabricators to easily adapt 5/16-24 right-hand thread rod ends to 5/8-inch OD tubing with a .058-inch wall thickness. It is an essential component for building high-quality, custom-length links where precision and material strength are critical.

• Manufacturer Part Number: 1844-106
• Material: Chromoly Steel
• Thread Size: 5/16-24
• Thread Direction: Right Hand (RH)
• Tubing Fitment: 5/8" OD x .058" Wall
• Body Type: Smooth
• Manufacturing: CNC Machined

This QA1 weld-in tube adapter provides a precision-engineered solution for connecting rod ends to custom suspension components, steering linkages, or chassis reinforcements. CNC machined to exacting tolerances, this adapter ensures a consistent fit and simplifies the fabrication process for custom builders and racers.

Constructed from a specialized, easily weldable chromoly steel alloy, the 1844-105 offers superior strength-to-weight characteristics compared to standard mild steel. The smooth exterior finish allows for seamless integration into 5/8-inch OD tubing with a .058-inch wall thickness.

• Manufacturer Part Number: 1844-105
• Thread Size: 5/16-24
• Thread Direction: Left Hand (LH)
• Tube OD Compatibility: 5/8"
• Wall Thickness: 0.058"
• Material: Chromoly Steel Alloy
• Manufacturing: CNC Machined

Designed for reliable mechanical connections, this QA1 linkage rod is engineered for custom throttle setups, shift linkages, and various automotive control assemblies. It is manufactured from high-strength carbon steel and features a protective coating to ensure long-term durability and resistance to corrosion in demanding environments.

This rod is specifically designed for ease of adjustment, featuring left-hand threads on one end and right-hand threads on the other. This configuration allows you to fine-tune the overall length and tension of your linkage without needing to disconnect the rod ends from the vehicle.

• Material: High-strength carbon steel
• Finish: Corrosion-resistant protective coating
• Thread Size: 5/16-24
• Overall Length: 4.5 inches
• Adjustment: Left-hand and right-hand threaded ends
• Manufacturer Part Number: 1698-117

QA1 High Travel springs are engineered to maximize suspension performance by reducing unsprung weight and increasing available travel. These 2.5" I.D. springs (MPN 14HT250B) are manufactured in the USA from specialized high-tensile chrome silicon alloy. This advanced material allows for a smaller wire diameter and fewer coils than traditional springs, resulting in a significantly lighter component that reacts faster to suspension inputs.

• High Travel Design: Increased distance between coils prevents coil bind and allows for more suspension movement.
• Lightweight Construction: Chrome silicon alloy reduces unsprung weight to improve shock valving response.
• Premium Finish: Durable black powder coating protects against corrosion and debris.
• Guaranteed Performance: Lifetime guarantee to stay within 2% of original free height and rate under normal operating conditions.
• Specifications: 14-inch length, 250 lbs/in spring rate, 2.5-inch inner diameter.

The QA1 2-1/2in ID High Travel Spring (MPN 14HT250) is engineered for performance-driven suspension systems requiring maximum travel and reduced unsprung weight. Manufactured in the USA from high-tensile chrome silicon alloy, these springs utilize a specialized wire diameter and coil design that allows for fewer coils and significantly more distance between them. This reduces the weight of the spring and increases the available travel before reaching coil-bind, allowing your suspension to react faster to track and road inputs.

Every QA1 spring undergoes a rigorous manufacturing process, including cold winding, heat treating, and shot peening to maximize fatigue life and ensure the spring rate remains consistent. The ends are precision ground to ensure a square, flat seat for stable operation. Finished in a durable silver powder coat, these springs are built to endure the stresses of performance driving while maintaining their physical properties.

• Inside Diameter: 2-1/2in
• Free Length: 14in
• Spring Rate: 250 lbs/in
• Material: High-tensile Chrome Silicon Alloy Steel
• Finish: Silver Powder Coated
• End Style: Squared and Ground
• Performance Benefit: Increased travel and reduced unsprung weight
• Warranty: Lifetime guarantee to remain within 2% of original free height and rate
• Manufacturer Part Number: 14HT250

This QA1 High Travel Spring (14HT150B) is engineered for performance coilover applications where maximizing suspension travel and minimizing unsprung weight are critical. Manufactured in the USA from high-tensile chrome silicon alloy, these springs utilize a smaller wire diameter and fewer coils than standard designs. This specialized construction reduces mass and provides significantly more travel before reaching coil bind, allowing the suspension to react faster to surface changes.

• Inside Diameter: 2-1/2 inches
• Free Length: 14 inches
• Spring Rate: 150 lbs/in
• Material: High-tensile chrome silicon alloy wire
• Finish: Durable black powder coating
• Manufacturing: Made in the USA
• Part Number: 14HT150B

Every QA1 spring is lifetime guaranteed to remain within 2% of its original free height and rate under normal operating conditions, ensuring consistent corner weights and predictable handling for the life of your suspension setup.

The QA1 14HT130B High Travel Spring is engineered for performance-oriented suspension systems where reducing unsprung weight and maximizing travel are critical. Manufactured in the USA from high-tensile chrome silicon alloy spring wire, this design utilizes a smaller wire diameter and fewer coils to achieve a lighter overall weight without compromising strength. This reduction in mass allows the suspension to react faster to road and track surfaces, optimizing mechanical grip.

• Product Series: High Travel (HT)
• Dimensions: 2.5-inch Inside Diameter (ID) x 14-inch length
• Spring Rate: 130 lbs/in
• Material: High-tensile, chrome silicon alloy wire
• Finish: Black powder coated for corrosion resistance
• Travel: Increased distance between coils to prevent premature coil bind
• Guarantee: Lifetime guarantee to remain within 2% of original free height and rate under normal operating conditions
• Manufacturing: Proudly made in the USA
• Manufacturer Part Number: 14HT130B

The QA1 14HT130 High Travel Spring is engineered for drivers seeking maximum suspension travel and reduced unsprung weight without sacrificing durability. Manufactured in the USA from high-tensile chrome silicon alloy, these springs feature a specialized design with fewer coils and a smaller wire diameter than standard springs. This construction allows for a larger distance between coils, providing increased travel and faster suspension reaction times.

Each spring undergoes a rigorous manufacturing process, including cold winding, heat treating, and shot peening to improve fatigue life and maintain accuracy. The ends are precision ground to ensure the spring sits square and operates consistently. Finished in a durable silver powder coat, every spring is clearly marked with its free length and rate for quick identification during tuning.

• Manufacturer Part Number: 14HT130
• Inner Diameter: 2-1/2 inches
• Free Length: 14 inches
• Spring Rate: 130 lbs/in
• Material: High-tensile Chrome Silicon Steel
• Finish: Silver Powder Coated
• Manufacturing: Cold wound, heat treated, and shot peened
• End Style: Squared and ground ends for flat seating
• Guarantee: Lifetime warranty to remain within 2% of original free height and rate

The QA1 14HT110 High Travel Spring is engineered for racers and performance drivers seeking maximum suspension travel and reduced unsprung weight. Manufactured in the USA from high-tensile chrome silicon alloy, these 2-1/2" I.D. springs utilize a specialized wire diameter and fewer coils to provide significantly more distance between coils. This design allows the spring to react faster to track conditions and optimizes suspension performance without the risk of early coil-bind.

• MPN: 14HT110
• Inside Diameter: 2-1/2"
• Free Length: 14"
• Spring Rate: 110 lbs/in
• Material: High-tensile chrome silicon alloy steel
• Finish: Durable silver powder coating
• Construction: Cold wound, heat-treated, and shot-peened for maximum fatigue life
• Ends: Squared and ground for straight, consistent, and accurate operation
• Guarantee: Lifetime guarantee to remain within 2% of original free height and rate

By using premium materials and rigorous post-processing, QA1 ensures these springs can be compressed to coil-bind without affecting the free height or rate. Each spring is clearly marked with its length and rate for easy identification during assembly or tuning.

The QA1 12HT500B High Travel Spring is engineered for performance applications requiring maximum suspension travel and reduced unsprung weight. Manufactured in the USA from high-tensile chrome silicon alloy wire, these springs utilize a smaller wire diameter and fewer coils than standard designs. This configuration allows the spring to react faster to surface changes while providing a larger distance between coils to prevent premature binding.

• Spring Rate: 500 lbs/in
• Dimensions: 2.5-inch Inside Diameter (ID) and 12-inch free height
• Material: Specialized high-tensile chrome silicon alloy for lightweight durability
• Finish: Durable black powder coating for long-lasting corrosion resistance
• Precision: Lifetime guarantee to remain within 2% of original free height and rate under normal conditions
• Origin: Proudly made in the USA
• Manufacturer Part Number: 12HT500B

The QA1 12HT350B High Travel Spring is engineered for drivers seeking to optimize suspension response and maximize usable wheel travel. Manufactured in the USA from high-tensile chrome silicon alloy, these springs utilize a smaller wire diameter and fewer coils than standard designs. This reduction in mass significantly lowers unsprung weight, allowing the damper to react faster to surface irregularities while providing a larger distance between coils to prevent premature coil bind.

• High-Tensile Alloy: Chrome silicon spring wire allows for fewer coils and reduced weight without sacrificing durability.
• Increased Travel: Optimized coil spacing provides maximum stroke for high-performance coilover setups.
• Lifetime Guarantee: QA1 springs are certified to remain within 2% of their original free height and rate under normal operating conditions.
• Corrosion Resistance: Finished in a durable black powder coating for long-lasting protection.

Specifications:
- Part Number: 12HT350B
- Inside Diameter (ID): 2-1/2"
- Free Length: 12"
- Spring Rate: 350 lbs/in
- Material: Chrome Silicon Alloy

Improve suspension response and reduce unsprung weight with the QA1 12HT250B High Travel Spring. Engineered from high-tensile chrome silicon alloy, this 12-inch spring utilizes a specialized wire diameter and fewer coils to provide increased travel and faster reaction times compared to standard designs. This high-tensile construction minimizes the risk of coil bind while maintaining the structural integrity required for performance coilover setups.

The durable black powder-coated finish provides excellent corrosion resistance for long-term reliability. Proudly made in the USA, QA1 springs are precision-manufactured to maintain a lifetime guarantee, ensuring they stay within 2% of their original free height and rate under normal operating conditions.

• Part Number: 12HT250B
• Spring Rate: 250 lbs/in
• Inside Diameter: 2-1/2 inch
• Free Length: 12 inch
• Material: High-tensile chrome silicon alloy
• Finish: Black powder coated
• Increased travel due to optimized coil spacing
• Lifetime guarantee to remain within 2% of original free height
• Made in the USA

The QA1 12HT200B High Travel Spring is engineered for coilover systems where maximizing suspension travel and minimizing unsprung weight are critical for performance. Manufactured in the USA from high-tensile chrome silicon alloy wire, this spring features a smaller wire diameter and fewer coils than standard designs. This architecture increases the distance between coils to prevent coil bind while allowing the suspension to react faster to road and track surfaces.

• Inside Diameter: 2-1/2 inches
• Free Length: 12 inches
• Spring Rate: 200 lbs/in
• Material: High-tensile chrome silicon alloy
• Finish: Durable black powder coating
• Manufacturing: Made in the USA
• Part Number: 12HT200B

Every QA1 spring includes a lifetime guarantee to remain within 2% of its original free height and rate under normal operating conditions, ensuring consistent handling and ride height for the life of the component.

This QA1 12HT170 High Travel Spring is engineered for drivers seeking maximum suspension performance and weight reduction. Manufactured in the USA from high-tensile chrome silicon alloy spring wire, these springs feature a specialized design that uses fewer coils and a smaller wire diameter than traditional springs. This construction significantly reduces unsprung weight for faster reaction times and provides increased travel by expanding the distance between coils.

• Precision Engineering: Cold wound, heat-treated, and shot-peened for superior fatigue life and durability.
• Consistent Performance: Ground ends ensure straight, accurate operation and the coil design allows for compression to coil-bind without affecting the spring rate or free height.
• Premium Finish: Durable silver powder coating for corrosion resistance and long-term protection.
• Identification: Free length and spring rate are clearly marked on each coil for easy identification.
• Technical Specs: 2.5-inch inside diameter (ID), 12-inch length, and 170 lbs/in spring rate.
• Lifetime Guarantee: QA1 guarantees all springs to remain within 2% of the original free height and rate under normal operating conditions.

Improve your suspension responsiveness with the QA1 12HT150B High Travel Spring. Engineered from high-tensile chrome silicon alloy spring wire, this 12-inch spring features a 2.5-inch inside diameter and a 150 lbs/in spring rate. The specialized alloy wire allows for a smaller wire diameter and fewer coils, which significantly reduces unsprung weight and provides increased travel compared to standard coil springs.

Designed to react faster to road and track conditions, these lightweight springs optimize suspension performance while maintaining structural integrity. The durable black powder-coated finish ensures long-term protection against the elements, and the precision manufacturing process guarantees consistent performance under load.

• Manufacturer Part Number: 12HT150B
• Length: 12 inches
• Inside Diameter: 2.5 inches
• Spring Rate: 150 lbs/in
• Material: High-tensile chrome silicon alloy
• Finish: Black powder coated
• Manufacturing: Made in the USA
• Warranty: Lifetime guarantee to remain within 2% of original free height and rate under normal conditions

Engineered for professional suspension tuning, the QA1 12HT150 High Travel Spring provides maximum travel and reduced unsprung weight for faster suspension response. These springs are manufactured from high-tensile chrome silicon alloy spring wire, allowing for a smaller wire diameter and fewer coils compared to standard designs. This configuration increases the distance between coils to prevent premature coil-bind while maintaining a consistent spring rate.

• Precision Manufacturing: Cold wound, heat treated, and shot peened to ensure long-term durability and fatigue resistance.
• Squared Ends: Both ends are precision ground to ensure the spring sits flat and operates straight for consistent loading.
• High-Quality Finish: Features a durable silver powder coated finish for corrosion resistance and a professional look.
• Identification: Clearly marked with free length and spring rate for quick identification in the shop or at the track.
• Lifetime Guarantee: QA1 guarantees these springs to remain within 2% of their original free height and rate under normal operating conditions.
• Specifications: 2.5-inch inside diameter, 12-inch free length, and 150 lbs/in spring rate.

Proudly made in the USA, the 12HT150 is designed to optimize coilover performance by reducing weight without sacrificing strength.

The QA1 12HT130 is a 2.5-inch I.D. High Travel Spring engineered to reduce unsprung weight and maximize suspension travel. Manufactured in the USA from high-tensile chrome silicon alloy wire, this design allows for fewer coils and a smaller wire diameter without compromising strength. The result is a lighter spring that reacts faster and provides a larger distance between coils to prevent premature coil-bind.

Each spring undergoes a rigorous manufacturing process, including cold-winding, heat-treating, and shot-peening to ensure long-term durability and fatigue resistance. The ends are precision ground to ensure the spring sits square and operates consistently. These springs are finished in a durable silver powder coat and are clearly marked with their specific length and rate for easy identification.

• Manufacturer Part Number: 12HT130
• Inside Diameter: 2.5 inches
• Free Length: 12 inches
• Spring Rate: 130 lbs/in
• Material: High-tensile chrome silicon steel
• Finish: Silver powder coated
• Construction: Cold-wound, heat-treated, and shot-peened
• Ends: Squared and ground for flat seating
• Guarantee: Lifetime guarantee to remain within 2% of original free height and rate

The QA1 12HT110 High Travel Spring is engineered for performance and racing applications where maximum suspension travel and minimum unsprung weight are critical. These springs are manufactured from high-tensile, chrome silicon alloy wire, allowing for a smaller wire diameter and fewer coils. This design results in a lighter spring that reacts faster to track conditions and provides significantly more travel before reaching coil-bind compared to standard springs.

• Precision Manufacturing: Cold-wound, heat-treated, and shot-peened to ensure long-term durability and resistance to fatigue.
• Consistent Loading: Both ends are squared and ground for straight, accurate operation within the spring seat.
• Protective Finish: The silver powder-coated finish provides excellent corrosion resistance and a professional appearance.
• Lifetime Guarantee: QA1 guarantees these springs will remain within 2% of their original free height and rate under normal operating conditions.

• Inside Diameter: 2-1/2 in.
• Free Length: 12 in.
• Spring Rate: 110 lbs/in.
• Material: Chrome Silicon Alloy Steel
• Finish: Silver Powder Coated
• MPN: 12HT110
• Origin: Made in the USA

Engineered for professional racing applications, the QA1 Ultimate Ball Joint Component Kit (MPN 1210-523) features a patented, 100% owner-rebuildable design that allows for precise suspension tuning without removing the housing from the vehicle. These self-lubricating ball joints are designed for extreme durability and smooth, bind-free operation under heavy loads.

The kit utilizes a precision-ground 52100 bearing steel race for exceptional wear resistance and even load distribution. With infinite preload adjustment, users can set breakaway torque as low as 0 ft-lb, ensuring the suspension remains responsive and free of mechanical stiction. This 1.625in component kit is ideal for racers needing to fine-tune roll centers and maintain consistent geometry through every corner.

• Manufacturer Part Number: 1210-523
• Design: Patented self-lubricating, 100% owner-rebuildable construction
• Material: Precision-ground 52100 bearing steel race
• Adjustment: Infinite preload adjustment for zero-bind performance
• Serviceability: Fully adjustable while installed on the vehicle; all parts are replaceable
• Application: Optimized for racing geometry and roll center tuning

Fits select 1970-2003 Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models.

The QA1 11HTBF250 High Travel Tapered Spring is engineered to reduce unsprung weight and provide maximum suspension travel for improved performance. Manufactured in the USA from high-tensile chrome silicon alloy, these springs utilize a specialized wire diameter and fewer coils than standard springs. This design allows for a lighter component that reacts faster to road or track inputs while maintaining its integrity under extreme compression.

Each spring undergoes a rigorous manufacturing process, including cold winding, heat treating, and shot peening to ensure long-term durability and fatigue resistance. The coil design allows for compression to coil-bind without affecting the spring rate or free height. The ends are ground square for a flat seating surface and consistent operation, finished with a durable silver powder coat for corrosion resistance.

• Manufacturer Part Number: 11HTBF250
• Length: 11 inches
• Inside Diameter: 4-1/8 inches (Tapered)
• Spring Rate: 250 lbs/in
• Material: High-tensile chrome silicon alloy
• Finish: Silver powder coated
• Manufacturing: Cold-wound, heat-treated, and shot-peened
• Guarantee: Lifetime guarantee to remain within 2% of original free height and rate under normal conditions

Fits select 1968-1972 Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models, including Chevelle, El Camino, GTO, and Cutlass.

The QA1 High Travel Series tapered spring is engineered to reduce unsprung weight and maximize suspension response. Manufactured in the USA from high-tensile chrome silicon alloy, these springs utilize a smaller wire diameter and fewer coils than standard springs. This design increases the distance between coils to prevent premature coil bind while maintaining a consistent spring rate throughout the suspension cycle. Each spring is cold-wound, heat-treated, and shot-peened to ensure long-term durability and fatigue resistance.

To ensure a perfect fit and stable operation, the ends are precision-ground for squareness. The silver powder-coated finish provides excellent corrosion resistance, and every spring is clearly marked with its free length and rate for easy identification. QA1 backs these springs with a lifetime guarantee to remain within 2% of their original free height and rate under normal operating conditions.

• Manufacturer Part Number: 10HTSF450
• Spring Rate: 450 lbs/in
• Free Length: 10 inches
• Inside Diameter: 3.5 inches (Tapered)
• Material: High-tensile chrome silicon steel
• Finish: Silver powder coated
• Ground ends for consistent seat pressure and alignment
• Lifetime guarantee on spring rate and height
• Made in the USA

Fits select 1970-2003 Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models including Camaro, Firebird, S10, and Caprice.

This QA1 High Travel Spring is engineered for performance applications where maximum suspension travel and minimum weight are critical. Manufactured from high-tensile, chrome silicon alloy spring wire, these springs utilize a smaller wire diameter and fewer coils than standard designs. This reduces unsprung weight for faster suspension reaction and allows for significantly more travel before reaching coil-bind, ensuring your suspension maintains its rate through its full range of motion.

Every QA1 spring undergoes a rigorous manufacturing process, including cold winding, heat treating, and shot peening to maximize fatigue life. Both ends are precision ground to ensure the spring sits square for straight, consistent operation. Finished in a durable silver powder coat, these springs are marked with their free length and rate for quick identification.

• Manufacturer Part Number: 10HTBF450
• Inside Diameter: 4-1/8in (Tapered)
• Free Length: 10 inches
• Spring Rate: 450 lbs/in
• Construction: High-tensile Chrome Silicon Steel
• Manufacturing: Cold wound, heat treated, and shot peened
• Finish: Silver Powder Coated
• Ends: Squared and ground
• Warranty: Lifetime guarantee to remain within 2% of original free height and rate
• Origin: Made in the USA

Fits select 1970-2003 Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models including Camaro, Firebird, Caprice, El Camino, and S10.

This QA1 High Travel tapered spring is engineered for drivers seeking maximum suspension performance without the weight penalty of traditional coils. Manufactured in the USA from high-tensile chrome silicon alloy steel, these springs feature a specialized wire diameter and coil count that reduces unsprung weight. This design allows for increased travel and a faster suspension response, ensuring your tires stay planted under load.

Each spring is cold-wound, heat-treated, and shot-peened to ensure long-term durability and resistance to fatigue. The ends are precision-ground for a square, consistent seat, and the entire unit is finished in a durable silver powder coat. QA1 high travel springs are designed to be compressed to coil-bind without losing free height or changing spring rate.

• Manufacturer Part Number: 10HTBF400
• Inside Diameter: 4-1/8in (Tapered)
• Free Length: 10 inches
• Spring Rate: 400 lbs/in
• Material: High-tensile chrome silicon alloy
• Finish: Silver powder coated
• Ground ends for straight, accurate operation
• Lifetime guarantee to remain within 2% of original free height and rate
• Made in the USA

The QA1 High Travel Spring (MPN: 10HT500B) is engineered for performance-driven suspension setups that demand maximum travel and minimal mass. Manufactured in the USA from specialized high-tensile chrome silicon alloy wire, these springs utilize a smaller wire diameter and fewer coils compared to standard designs. This configuration significantly reduces unsprung weight and allows the suspension to react faster to surface changes while providing a larger distance between coils to prevent premature coil bind.

Each spring is finished in a durable black powder coat for long-term corrosion resistance and is backed by a lifetime guarantee to remain within 2% of its original free height and rate under normal operating conditions.

• Spring Rate: 500 lbs/in
• Free Length: 10 inches
• Inside Diameter: 2.5 inches (2-1/2")
• Material: High-tensile chrome silicon alloy
• Finish: Black powder coated
• Part Number: 10HT500B
• Manufacturing: Made in the USA
• Guarantee: Lifetime guarantee to stay within 2% of rate and height