The GSC Power-Division high-pressure shimless conical valve spring and titanium retainer kit (MPN 5026) is engineered for high-performance Nissan RB26DETT builds requiring extreme valvetrain stability. This kit is specifically designed to manage high manifold pressures, rated for applications running up to 60 PSI of boost.

By utilizing a conical spring profile, this kit reduces the oscillating mass of the retainer and the upper portion of the spring. This reduction in weight allows for improved engine response and higher RPM potential while maintaining the seat pressure necessary to prevent valve float under heavy boost. The shimless design facilitates a more direct installation on the RB26 cylinder head, ensuring precise tolerances for aggressive camshaft profiles.

• Compatible Engine: Nissan RB26DETT
• Spring Type: High-Pressure Shimless Conical
• Retainer Material: Lightweight Aerospace-Grade Titanium
• Maximum Rating: Up to 60 PSI Boost
• Manufacturer Part Number: 5026

Each kit includes a complete set of high-pressure conical springs and matching titanium retainers to provide a comprehensive valvetrain upgrade for forced induction setups.

Fits Audi R8 and Lamborghini Huracan models equipped with the V10-5.2L engine.

The GSC Power-Division Valve Spring and Titanium Retainer Kit (MPN 5025) is engineered for high-performance 5.2L V10 builds requiring superior valvetrain stability. This kit replaces the factory components with high-tension springs and lightweight titanium retainers, significantly reducing reciprocating mass to prevent valve float at high RPMs and under increased boost levels.

• 6AL4V Titanium retainers for maximum weight savings and durability.
• High-quality valve springs designed for increased lift and seat pressure.
• Includes hardened steel spring seats to protect the cylinder head.
• Supplied with premium Viton valve seals for a complete installation.
• Designed as a direct fit for the Audi and Lamborghini 5.2L V10 platform.
• Manufacturer Part Number: 5025

Fits 2022+ Subaru WRX models equipped with the FA24F engine.

Engineered for high-performance applications, the GSC Power-Division 5024 kit provides the valvetrain stability required for increased boost levels and higher RPM limits. This kit utilizes a conical spring design, which offers superior natural frequency damping over traditional cylindrical springs. This geometry reduces valvetrain vibration and allows for the use of a smaller, lighter titanium retainer to minimize reciprocating mass.

• High-pressure conical spring geometry for improved harmonic damping
• Lightweight Grade 5 Titanium retainers for reduced valvetrain mass
• Designed to prevent valve float in high-RPM and high-boost environments
• Direct fit for the FA24F engine platform
• Manufacturer Part Number: 5024

Fits BMW S58 engines found in high-performance G-series M3/M4 and F-series X3M/X4M models.

The GSC Power-Division Beehive Valve Spring and Titanium Retainer Kit (MPN 5023) is engineered for S58 owners pushing the limits of forced induction. Rated for applications running up to 70 PSI of boost, this kit provides the essential valvetrain stability required to prevent valve float under extreme cylinder pressures. The beehive spring geometry reduces active mass and improves harmonic resistance compared to traditional cylindrical springs, allowing for more consistent valve control at high RPMs.

• Designed specifically for the BMW S58 engine platform
• Tested and rated for high-boost applications up to 70 PSI
• Includes lightweight Titanium (Ti) retainers to minimize valvetrain inertia
• Beehive spring profile for superior harmonic damping and RPM stability
• Manufacturer Part Number: 5023

Designed for the 2022+ Subaru WRX equipped with the FA24F engine, the GSC Power-Division Conical Valve Spring and Titanium Retainer Kit (MPN: 5021) provides the valvetrain stability required for high-RPM performance and forced induction builds. This kit replaces the factory spring and retainer assembly to ensure consistent valve control under increased boost and lift.

The conical spring design is engineered to reduce parasitic mass and dampen harmful harmonics more effectively than traditional cylindrical springs. By pairing these with lightweight Grade 5 titanium retainers, this kit significantly reduces reciprocating valvetrain weight, allowing for improved engine response and a safer high-RPM ceiling.

• Fits 2022+ Subaru WRX (FA24F engine)
• Conical spring profile for superior harmonic damping and reduced mass
• Precision-machined titanium retainers for maximum weight savings
• Ideal for builds requiring higher lift and increased RPM stability
• Complete kit including all necessary springs and retainers
• Manufacturer Part Number: 5021

The GSC Power-Division Conical Valve Spring and Titanium Retainer Kit is engineered specifically for the high-performance Toyota G16E-GTS 3-cylinder engine found in the GR Yaris and GR Corolla. This kit addresses the valvetrain stability issues common when pushing the G16E to higher RPM ranges and increased boost levels.

By utilizing a conical spring profile, GSC reduces the reciprocating mass of the valvetrain while improving harmonic damping compared to standard cylindrical springs. This design allows for a higher natural frequency, significantly reducing the risk of valve float and spring surge. The included CNC-machined titanium retainers offer exceptional strength with minimal weight, ensuring precise valve control under the most demanding racing conditions.

• Fits 2020+ Toyota GR Yaris and 2023+ Toyota GR Corolla (G16E-GTS)
• Conical spring design reduces mass and improves valvetrain harmonics
• Lightweight aerospace-grade titanium retainers for reduced reciprocating weight
• Increased seat pressure to support high-boost applications
• Complete set of springs and retainers included
• Manufacturer Part Number: 5017

Optimized for the high-revving Ford 5.2L Voodoo and Predator engines, the GSC Power-Division P-D Conical Valve Spring and Titanium Retainer Kit (MPN 5013) provides the valvetrain stability required for performance driving and forced induction. The conical spring design offers superior natural damping compared to traditional cylindrical springs, effectively controlling harmonics while reducing reciprocating mass at the retainer end.

• Fits Ford 5.2L Voodoo (GT350) and Predator (GT500) engines.
• Conical spring profile reduces valve spring surge and harmonic vibration.
• Precision-machined Titanium (Ti) retainers for maximum weight savings and strength.
• Designed to handle increased lift and high-RPM operation.
• Complete set including springs and retainers.
• Manufacturer Part Number: 5013

Fits Ford Mustang Gen 3 Coyote (5.0L).

The GSC Power-Division P-D Conical Valve Spring and Titanium Retainer Kit is a critical valvetrain upgrade for the Gen 3 5.0L Coyote engine. Designed to handle the rigors of high-RPM operation and performance camshaft profiles, this kit replaces the factory springs with precision-engineered conical units and lightweight titanium retainers. The conical spring geometry provides superior harmonic damping and reduces reciprocating mass at the retainer end, which is essential for maintaining valve control and preventing float at higher engine speeds.

• Conical spring design for improved harmonic control and high-RPM stability
• High-strength, lightweight titanium retainers to reduce valvetrain inertia
• Engineered specifically for Gen 3 Coyote valvetrain geometry and seat pressures
• Ideal for forced induction or high-lift naturally aspirated builds
• Manufacturer Part Number: 5012

Fits Ford Mustang Gen 1/2 (5.0L Coyote).

Engineered for high-performance applications, the GSC Power-Division High Pressure Conical Valve Spring and Titanium Retainer Kit (MPN 5011) provides the seat pressure and stability required for Gen 1 and Gen 2 5.0L Coyote engines. The conical spring design reduces reciprocating mass at the retainer end, significantly improving harmonic damping and allowing for higher RPM limits without the risk of valve float.

This kit utilizes lightweight, aerospace-grade titanium retainers to further reduce valvetrain inertia, ensuring precise valve control and reliable performance under high boost or aggressive camshaft profiles.

• High-pressure conical valve springs for superior harmonic control and stability
• Precision-machined titanium retainers for significantly reduced valvetrain mass
• Specifically engineered for Gen 1 and Gen 2 Coyote 5.0L cylinder heads
• Essential for high-revving naturally aspirated or forced induction builds
• Manufacturer Part Number: 5011

Fits Ford Mustang Coyote Gen 1/2 engines (5.0L).

Upgrade your valvetrain stability with the GSC Power-Division Conical Valve Spring and Titanium Retainer Kit. Engineered for high-performance applications, this kit replaces the factory valve springs and retainers to provide better control during high-RPM operation. The conical spring design reduces reciprocating mass at the retainer end, minimizing harmonics and spring surge. This is paired with precision-machined titanium retainers, offering a superior strength-to-weight ratio over OE steel components to ensure reliable valve timing and seat pressure.

• Specifically designed for Gen 1 and Gen 2 Coyote 5.0L engines
• Conical spring profile for improved valvetrain harmonics
• CNC-machined titanium retainers for reduced mass and high-load durability
• Helps prevent valve float in performance driving conditions
• Manufacturer Part Number: 5010

Fits select 1990-2006 Mitsubishi Lancer Evolution, Eclipse, Galant VR-4, Eagle Talon, and Plymouth Laser models (4G63T).

GSC Power-Division CNC-machined spring seats are engineered for precision valvetrain setup on the Mitsubishi 4G63T platform. These seats are manufactured from high-strength chromoly and feature a .035-inch increased thickness over factory OEM units. This specific height allows for increased valve spring seat pressure or fine-tuning of the installed height without the need for cylinder head machining.

• Manufactured from high-strength Chromoly steel
• Precision CNC-machined for exact tolerances
• .035" over OEM thickness for spring pressure adjustment
• Complete set of 16 seats
• Direct fit for 4G63T cylinder heads
• Manufacturer Part Number: 4041-16

Fits Honda B-Series VTEC engines including B16A, B17A, and B18C equipped with aftermarket cam gears.

The GSC Power-Division Titanium Washer and Bolt Kit (MPN 4015) provides a high-strength, lightweight hardware solution for securing aftermarket cam gears. By utilizing titanium, this kit reduces rotational mass at the end of the camshafts while providing exceptional corrosion resistance and high tensile strength to maintain timing accuracy under high-RPM conditions.

These fasteners are specifically designed for the B-Series VTEC platform, replacing factory hardware with precision-machined titanium components that ensure a reliable clamp on the camshaft snout. This is an essential upgrade for built heads where performance and reliability are paramount.

• Material: High-grade Titanium (Ti) for weight reduction and strength
• Engine Compatibility: Honda B16A, B17A, B18C VTEC
• Requirement: Specifically for use with aftermarket cam gears
• Includes: High-strength titanium bolts and matching washers
• Manufacturer Part Number: 4015

Fits 1999-2013 Porsche 911 GT3 Cup models (996 and 997 generations).

This GSC Power-Division valve guide is engineered to meet the high-revving demands of Porsche GT3 Cup engines. Compatible with both intake and exhaust ports, this standard-style guide features a +.001" oversize outside diameter (OD). This slight oversize is critical for maintaining a proper interference fit in cylinder heads where the original guide bores have been slightly enlarged or worn during service.

• Universal application for intake or exhaust ports on 996/997 GT3 Cup heads
• +.001" oversize OD ensures a secure fit in worn or oversized guide bores
• Standard style design for factory-like installation and performance
• Precision machined for consistent valve stem alignment and heat transfer
• Sold as a single unit
• Manufacturer Part Number: 3997.001-1

Fits 1999-2011 Porsche 911 GT3 Cup (996 and 997 generations).

Engineered for the high-stress environment of Porsche GT3 Cup racing engines, these GSC Power-Division (P-D) valve guides are precision-machined from a manganese bronze alloy. This material offers superior thermal conductivity to pull heat away from the valve stem and provides excellent lubricity to minimize wear during sustained high-RPM operation.

These standard-style (STD) guides are designed for direct installation in both intake and exhaust positions. This set of 12 provides the necessary components for a comprehensive cylinder head refresh, ensuring precise valve stem alignment and optimized heat dissipation for high-performance track use.

• Material: High-thermal conductivity Manganese Bronze
• Position: Compatible with Intake and Exhaust valves
• Sizing: Standard (STD) style profile
• Quantity: Complete set of 12 guides
• Manufacturer Part Number: 3997-12

Optimized for high-performance builds, this set of GSC Power-Division valve guides is engineered specifically for the Toyota G16E engine. These guides are CNC-machined from a proprietary manganese bronze alloy, providing significantly better heat dissipation and wear resistance than factory cast iron components, making them an essential upgrade for engines running stainless steel or titanium valves.

The "stopper style" design features a precise integrated shoulder that acts as a positive stop during installation. This ensures every guide is seated at the exact same depth in the cylinder head, simplifying the machining process and maintaining consistent valve train geometry.

• Precision-machined from high-grade manganese bronze for superior thermal conductivity
• Stopper-style shoulder ensures consistent, accurate installation depth
• High-lubricity material reduces friction and extends valve stem life
• Direct fit for Toyota G16E intake ports
• Set includes 6 intake valve guides
• Manufacturer Part Number: 3146-6

Fits Toyota 2JZ-GE and 2JZ-GTE engines.

This GSC Power-Division manganese bronze exhaust valve guide is engineered for high-performance 2JZ builds where precision and durability are critical. Manufactured from a proprietary manganese bronze alloy, these guides provide significantly better thermal conductivity and natural lubricity than OEM cast iron, helping to pull heat away from the exhaust valve stems while reducing friction.

This guide features a +.001-inch oversize outside diameter (OD), making it an essential component for cylinder heads with worn or slightly enlarged guide bores that require a tighter press fit to maintain stability. The stopper-style design ensures consistent installation depth every time, providing a reliable foundation for your valvetrain under high-boost and high-RPM conditions.

• Application: Toyota 2JZ (Exhaust side)
• Material: High-strength Manganese Bronze
• Oversize: +.001" OD for worn bore repair
• Style: Stopper style for precise seating
• Quantity: Sold individually
• Manufacturer Part Number: 3145.001-1

Fits Toyota 2JZ engines. Optimize your cylinder head valvetrain stability with this GSC Power-Division Manganese Bronze Exhaust Valve Guide set. Engineered for high-performance and racing applications, these guides provide superior thermal conductivity and a lower coefficient of friction compared to factory cast-iron components.

These stopper-style guides are precision-machined to standard (STD) dimensions, ensuring consistent installation depth and a secure fit within the cylinder head. The manganese bronze material is specifically selected for the extreme heat environments of the exhaust side, particularly in turbocharged 2JZ builds, where it resists valve stem seizing and significantly reduces wear during high-RPM operation.

• Engine Compatibility: Toyota 2JZ-GTE / 2JZ-GE
• Material: High-strength Manganese Bronze
• Style: Stopper Style for precise seating
• Size: Standard (STD) Bore
• Location: Exhaust Side
• Quantity: Set of 12 guides
• Manufacturer Part Number: 3145-12

Optimized for the high-thermal demands of the Nissan VR38DETT engine, these GSC Power-Division exhaust valve guides provide superior durability and heat dissipation compared to factory components. Machined from high-strength manganese bronze, these guides offer excellent natural lubricity and thermal conductivity, essential for high-horsepower or forced-induction builds where exhaust gas temperatures are extreme.

The "stopper style" design features an integrated shoulder to ensure precise depth and seat height during installation, preventing guide movement under high-load conditions. These guides are specifically sized for 6.6mm valve stems, providing the tight tolerances required for high-RPM stability and oil control.

• Engine Compatibility: Nissan VR38DETT
• Material: Manganese Bronze for improved wear resistance and heat transfer
• Design: Stopper Style for positive positioning
• Stem Diameter: 6.6mm
• Quantity: Full set of 12 exhaust valve guides
• Manufacturer Part Number: 3143-12

Engineered for high-performance cylinder head builds, these GSC Power-Division manganese bronze intake valve guides are specifically designed for the Toyota 2JZ engine. Manganese bronze is the material of choice for professional engine builders because of its superior thermal conductivity and natural lubricity. These properties significantly reduce friction and stem wear compared to standard factory cast iron guides, which is critical in high-RPM or forced induction applications.

These guides utilize a "stopper style" flanged design, featuring a precision-machined shoulder that ensures consistent installation depth across all cylinders. This design simplifies the assembly process by providing a positive stop, eliminating the need for manual depth measurements while pressing. They are fully compatible with both aftermarket stainless steel and titanium valves.

• Material: High-strength Manganese Bronze for improved heat dissipation
• Application: Toyota 2JZ (Intake side)
• Design: Stopper style (flanged) for precise seating height
• Quantity: Complete set of 12
• Manufacturer Part Number: 3142-12

Fits Audi R8 and Lamborghini Huracan models equipped with the V10-5.2L engine.

Engineered for precision and thermal efficiency, the GSC Power-Division Stopper Style Valve Guide set provides a reliable solution for high-performance V10-5.2L cylinder heads. These guides are designed for both intake and exhaust applications, featuring an integrated stopper shoulder that ensures exact installation depth and prevents guide migration under the extreme heat and vibration of high-RPM operation.

• Precision-machined for optimal valve stem clearance and heat dissipation.
• Stopper style design ensures consistent seating and mechanical positioning.
• Compatible with both intake and exhaust valve locations.
• Includes ten (10) valve guides.
• Manufacturer Part Number: 3135-10

This GSC Power-Division P-D Valve Guide Set is engineered for the high-performance requirements of the Ford Coyote Gen 3 5.0L engine. Replacing worn guides is a critical step during a cylinder head rebuild to restore proper valve stem stability, ensuring precise valve seating and preventing oil consumption caused by excessive clearance.

• Complete set of 16 guides (Intake and Exhaust)
• Precision-machined for consistent tolerances and optimal heat transfer
• Engineered for compatibility with OEM or GSC 1102 valve seals
• Manufacturer Part Number: 3133-16

Built to withstand the rigors of high-RPM use, these guides provide the durability needed for both street performance and track-oriented Ford Coyote Gen 3 builds.

Designed for high-performance builds, these GSC Power-Division Manganese Bronze Intake Valve Guides provide superior thermal conductivity and wear resistance for BMW B58, S58, and Toyota GR Supra engines. These guides are a critical upgrade over factory components, especially in high-boost or high-RPM applications where valve stem heat management is essential to prevent seizing or premature wear.

Each guide is precision-machined from a proprietary manganese bronze alloy, offering a lower coefficient of friction than standard OEM guides. The integrated stopper design ensures consistent, repeatable installation depth during the cylinder head assembly process, removing the guesswork and ensuring proper valve stem geometry.

• Proprietary manganese bronze alloy for enhanced heat dissipation and durability
• Integrated stopper for precise, consistent installation depth and alignment
• Lower friction coefficient than factory cast iron or steel guides
• Designed for use with high-performance stainless steel or titanium valves
• Set of 12 intake valve guides
• Manufacturer Part Number: 3132-12

Upgrade your cylinder head with GSC Power-Division manganese bronze exhaust valve guides, specifically engineered for BMW B58 and S58 engine platforms, including the Toyota GR Supra. This set of 12 guides (MPN 3131-12) provides a significant durability and performance upgrade over factory components in high-heat, high-boost environments.

• Manganese Bronze Construction: Offers superior thermal conductivity to pull heat away from the valve stems and provides natural lubricity to reduce friction and wear.
• Integrated Stopper: Machined with a built-in stopper to prevent guide migration or "dropping" into the port under extreme operating temperatures and high-rpm vibrations.
• Performance Ready: Ideal for high-horsepower builds using aftermarket valves and aggressive camshaft profiles where OE guide tolerances may fail.
• Set of 12: Includes a full set for the exhaust side of the cylinder head.

These precision-machined guides ensure consistent valve stem alignment and improved heat dissipation, making them a critical component for any serious B58 or S58 engine build.

Restore cylinder head integrity with this set of GSC P-D exhaust valve guides engineered for the Toyota 2JZ platform. These precision-machined components are specifically sized for 6.6mm valve stems, providing the tight tolerances and consistent fitment required for high-performance valvetrains.

• Fits Toyota 2JZ engines
• Optimized for 6.6mm exhaust valve stem diameters
• Includes complete set of 12 exhaust guides
• Precision machined for stable valve-to-seat alignment
• Manufacturer Part Number: 3113-12

Designed to handle the extreme thermal loads found on the exhaust side of the 2JZ, these GSC P-D guides replace worn or out-of-spec factory units. By ensuring a stable and consistent guide-to-stem interface, they help prevent premature valve seal wear and maintain critical valve seating geometry for long-term engine reliability.

Fits Ford Coyote 5.0L engines.

Ensure long-term cylinder head reliability and improved heat dissipation with this GSC Power-Division Valve Guide Set. Precision-machined from high-strength manganese bronze, these guides offer significantly better thermal conductivity than standard cast iron or steel components. This efficiency allows heat to pull away from the valve stem more effectively, which is essential for high-RPM and high-load Ford Coyote applications.

These guides provide a durable, low-friction surface for both intake and exhaust valves, reducing stem wear and maintaining tight tolerances during aggressive camshaft operation. Whether you are performing a factory refresh or a dedicated performance build, these manganese bronze guides deliver the stability required for modern overhead cam engines.

• Material: High-strength Manganese Bronze
• Application: Intake and Exhaust valves
• Quantity: Set of 16 guides
• Manufacturer Part Number: 3101-16

Fits Ford Mustang GT and GT500 models equipped with the 5.4L DOHC engine.

GSC Power-Division manganese bronze valve guides are engineered for high-performance applications where factory components often struggle. These intake guides provide superior thermal conductivity and a significantly lower coefficient of friction compared to standard OE materials. This improved heat transfer is essential for high-RPM and forced-induction 5.4L builds, effectively pulling heat away from the valve stem to prevent galling and extend valvetrain life.

• Precision machined from high-grade manganese bronze alloy
• Superior heat dissipation for increased durability under heavy loads
• Reduced friction for improved valve stem life and performance
• Engineered for high-lift camshafts and aftermarket valvetrain setups
• Includes a full set of 16 intake valve guides
• Manufacturer Part Number: 3098-16

Upgrade your cylinder head's valvetrain stability with this set of 16 GSC Power-Division manganese bronze exhaust valve guides, specifically engineered for the Ford Mustang GT and GT500 (5.4L) engines. These guides are a critical upgrade for high-performance builds where increased heat and RPM require superior wear resistance compared to standard cast iron components.

GSC Power-Division manufactures these guides from a proprietary manganese bronze alloy, which offers excellent thermal conductivity to pull heat away from the valve stem while providing a low-friction surface for improved lubrication. This ensures tighter tolerances over the life of the engine and prevents premature valve guide wear, which is a common cause of oil consumption and loss of seat sealing.

• Precision CNC-machined for exact fitment and concentricity
• Manganese bronze material provides superior heat dissipation and wear resistance
• Ideal for both street performance and high-boost racing applications
• Replaces original equipment exhaust guides
• Manufacturer Part Number: 3097-16
• Quantity: Set of 16 exhaust valve guides

Fits 2001-2006 BMW M3 (S54) models.

Restore valvetrain stability and improve heat dissipation in your high-revving S54 engine with this set of 12 manganese bronze valve guides from GSC Power-Division. These precision-machined guides are designed to replace worn factory components, ensuring tight tolerances for valve stem alignment and reducing oil consumption in high-performance applications.

Manganese bronze is the industry standard for performance builds due to its superior thermal conductivity compared to OEM cast iron guides. This material efficiently pulls heat away from the valve stem while offering natural lubricity to minimize friction and wear. These guides are engineered to work in both intake and exhaust positions for a complete cylinder head refresh.

• Precision-machined from high-grade manganese bronze
• Optimized for superior heat transfer and wear resistance
• Compatible with both intake and exhaust valve positions
• Direct replacement for BMW S54 inline-six valvetrains
• Manufacturer Part Number: 3096-12
• Quantity: Set of 12 guides

Fits BMW E92 335i Inline 6 models.

GSC Power-Division manganese bronze intake valve guides are engineered for high-performance cylinder head builds where thermal conductivity and wear resistance are paramount. Unlike standard OE guides, these manganese bronze components offer superior lubricity and heat dissipation, which is critical for maintaining valve stem integrity under high-stress conditions. These guides are precision-machined to ensure consistent clearances and optimal valve seating, providing a durable solution for both street and track-driven BMW engines.

• Manufacturer Part Number: 3090-12
• Material: Proprietary Manganese Bronze
• Position: Intake side
• Engine Type: Inline 6
• Quantity: Full set of 12 guides

Designed for high-performance BMW E92 335i Inline 6 cylinder heads, these GSC Power-Division manganese bronze exhaust valve guides offer a significant upgrade over standard OE components. Manganese bronze is the preferred material for performance valvetrains due to its superior thermal conductivity and high wear resistance, effectively drawing heat away from the valve stems to maintain consistent clearances under high load.

Whether you are performing a standard refresh or a full performance build, these precision-machined guides provide the durability needed for forced induction applications. These guides replace worn factory units to restore valve stability and improve overall valvetrain longevity.

• Manufactured from high-strength manganese bronze for optimal heat dissipation
• Precision machined for exact fitment and tight tolerances
• Lower friction coefficient compared to factory cast iron guides
• Specifically designed for the BMW E92 335i Inline 6 platform
• Set includes 12 exhaust valve guides
• Manufacturer Part Number: 3089-12