Strengthen your valvetrain for high-performance applications with the GSC Power-Division Conical Valve Spring and Titanium Retainer Kit. Engineered specifically for the Ford 3.5L H.O. EcoBoost engine found in the Raptor, Platinum, and Limited trims, this kit provides the high-RPM stability and seat pressure required to prevent valve float in forced induction environments.

The conical spring geometry offers significant advantages over traditional cylindrical springs by reducing reciprocating mass and improving harmonic damping. By pairing these springs with precision-machined titanium retainers, valvetrain inertia is minimized, allowing for more aggressive cam profiles and increased boost levels without compromising valve control.

• Fits Ford F-150 Raptor, Platinum, and Limited models with 3.5L H.O. EcoBoost engines
• Advanced conical spring design for superior vibration control and reduced mass
• Lightweight titanium retainers for improved throttle response and RPM capability
• Engineered to withstand the thermal and mechanical stresses of turbocharged H.O. engines
• Manufacturer Part Number: 5102

Upgrade your valvetrain for high-performance applications with the GSC Power-Division High Pressure Conical Valve Spring and Titanium Retainer Kit. Engineered specifically for the Mitsubishi 4G63T engine, this kit (MPN: 5098) provides the increased seat pressure and stability required for high-boost and high-RPM builds where factory components are prone to failure.

The conical spring geometry reduces reciprocating mass and improves harmonic damping compared to traditional cylindrical springs. Paired with lightweight, CNC-machined titanium retainers, this set ensures precise valve control and significantly reduces the risk of valve float during aggressive lift cycles or high-speed operation.

• Engine Compatibility: Mitsubishi 4G63T
• Spring Style: High-pressure conical design for reduced mass and vibration
• Retainer Material: Lightweight, high-strength CNC-machined titanium
• Ideal for high-boost and high-RPM performance builds
• Manufacturer Part Number: 5098

Designed for high-output Mitsubishi 4G63T engines, the GSC Power-Division Extreme Pressure Conical Valve Spring and Titanium Retainer Kit (MPN 5097) provides the valvetrain stability necessary for high-lift camshafts and elevated RPM ranges. The conical spring architecture reduces the moving mass at the top of the spring, effectively minimizing valvetrain harmonics and increasing the RPM ceiling before valve float occurs.

This kit includes precision-engineered titanium retainers that offer a significant weight reduction compared to steel alternatives without compromising structural integrity. These components work in tandem to ensure precise valve control under the extreme cylinder pressures common in turbocharged applications.

• Fits Mitsubishi 4G63T engines
• Advanced conical spring design for reduced oscillating mass
• Includes high-strength lightweight titanium retainers
• Engineered for extreme pressure and high-lift cam profiles
• Manufacturer Part Number: 5097

Fits 2017-present Audi RS3 models equipped with the 2.5L TFSI DAZA engine.

Engineered for high-output 2.5L TFSI builds, the GSC Power-Division Beehive Valve Spring and Titanium Retainer Kit (MPN 5096) provides the necessary valvetrain stability for extreme forced induction applications. The beehive spring design offers a progressive spring rate and reduced reciprocating mass compared to traditional cylindrical springs, effectively eliminating valve float and bounce in high-RPM scenarios.

This kit is specifically validated for builds running up to 60 PSI of boost. The included retainers are CNC-machined from aerospace-grade titanium to minimize weight on the valve stem, allowing for quicker response and increased reliability under heavy thermal and mechanical stress.

• Compatible with Audi RS3 DAZA engines (2017+)
• Rated for maximum boost levels up to 60 PSI
• Beehive spring architecture for superior harmonics control
• Lightweight titanium retainers reduce valvetrain mass
• Manufacturer Part Number: 5096

Fits BMW Z4 and Toyota Supra models equipped with the B58 engine.

The GSC Power-Division (P-D) Beehive Valve Spring and Titanium Retainer Kit is engineered to handle the increased valvetrain stress associated with high-performance B58 builds. By utilizing a beehive-shaped spring design, this kit offers superior harmonic resistance and reduced reciprocating mass compared to standard cylindrical springs. This is a critical upgrade for preventing valve float at high RPMs and under the elevated boost pressures common in tuned applications.

The included CNC-machined titanium retainers significantly lighten the valvetrain assembly, improving engine response and overall reliability during aggressive driving or track use.

• Engineered specifically for the B58 engine platform
• High-tensile beehive valve springs for improved harmonic damping
• Lightweight CNC-machined titanium retainers to reduce valvetrain mass
• Prevents valve float in high-boost and high-RPM applications
• Manufacturer Part Number: 5091

Engineered for high-performance Toyota 2JZ-GTE applications, the GSC Power-Division (MPN 5086) Extreme Pressure Single Conical Valve Spring and Titanium Retainer Kit provides the valvetrain stability required for high-boost and high-RPM builds. The single conical spring profile reduces reciprocating mass and offers superior harmonic damping compared to conventional straight-wall springs.

• Fits Toyota 2JZ-GTE engines.
• Single conical spring design for reduced top-end weight and improved valvetrain harmonics.
• Extreme pressure rating specifically developed for high-lift camshafts and high-boost environments.
• Precision-machined Titanium (Ti) retainers for maximum strength and weight reduction.
• Comprehensive kit includes springs and retainers for a complete valvetrain upgrade.
• Manufacturer Part Number: 5086

Fits Nissan RB26DETT engines.

This GSC Power-Division valvetrain kit is engineered specifically for high-output RB26 builds requiring maximum stability under extreme manifold pressure. By utilizing a conical spring design, this kit reduces reciprocating mass at the retainer end and provides superior harmonic dampening compared to traditional cylindrical springs. This setup is critical for preventing valve float in high-revving engines pushed up to 50 PSI of boost.

The shimless configuration simplifies your cylinder head assembly while the lightweight titanium retainers offer the strength needed for aggressive camshaft profiles. Whether you are building a dedicated drag car or a high-response street machine, these components ensure your valvetrain remains precise and controlled at the limit.

• Fits Nissan RB26DETT engines
• Includes conical valve springs and titanium retainers
• Shimless design for reduced valvetrain complexity
• Maximum boost rating: 50 PSI
• Manufacturer Part Number: 5085

Specifically engineered for high-output Nissan VR30DDTT engines, the GSC Power-Division HP Conical Valve Spring, Ti Retainer, and Seat Kit provides the valvetrain stability required for aggressive builds. This comprehensive upgrade is designed to handle the extreme cylinder pressures and high engine speeds found in professional motorsport applications, supporting up to 10,500 RPM and 55 PSI of boost.

The conical spring architecture utilizes a smaller, lighter retainer which significantly reduces reciprocating mass. This design allows for superior valve control and improved harmonic damping compared to traditional cylindrical springs. Each kit includes precision-machined titanium retainers and hardened steel seats to ensure long-term durability under high-lift and high-boost conditions, protecting your engine from valve float and catastrophic failure.

• Direct fit for Nissan VR30DDTT (3.0L Twin-Turbo V6) engines
• Conical spring profile for reduced top-end mass and improved harmonics
• Lightweight aerospace-grade Titanium retainers
• Precision-hardened steel spring seats included
• Max Rating: 10,500 RPM / 55 PSI Boost
• Manufacturer Part Number: 5084

Fits Nissan VR30DDTT (3.0L Twin Turbo V6) engines.

Engineered for high-output builds, the GSC Power-Division HP Conical Valve Spring, Titanium Retainer, and Seat Kit (MPN 5083) provides the valvetrain stability required for extreme performance. The conical spring design reduces reciprocating mass at the retainer end, allowing for superior harmonic control and preventing valve float during high-RPM operation.

This valvetrain upgrade is specifically designed to handle the pressures of high-boost applications, rated for up to 9,500 RPM and 40 PSI of boost. The kit includes lightweight titanium retainers to minimize valvetrain inertia and hardened seats to prevent spring galling on the cylinder head surface.

• Engine Compatibility: Nissan VR30DDTT
• Maximum Engine Speed: 9,500 RPM
• Maximum Boost Pressure: 40 PSI
• Spring Design: Conical for improved harmonic damping
• Retainer Material: Lightweight Titanium
• Includes: Valve springs, titanium retainers, and hardened seats
• Manufacturer Part Number: 5083

The GSC Power-Division 5076 valve spring kit is engineered to provide the valvetrain stability required for high-performance Subaru EJ series engines. This kit utilizes a conical spring design, which features a smaller diameter at the top of the spring to reduce reciprocating mass and improve harmonic damping compared to traditional cylindrical designs.

By pairing these conical springs with lightweight, aerospace-grade titanium retainers, this kit significantly reduces the weight at the valve. This reduction in mass allows for higher engine speeds and provides essential protection against valve float in high-boost or high-RPM applications where standard components may fail.

• Fits Subaru EJ series engines
• Conical spring profile for superior harmonic control and reduced mass
• Precision-machined titanium retainers for maximum weight savings
• Designed to support aggressive camshaft profiles
• Manufacturer Part Number: 5076

Fits Nissan RB26DETT (RB26) engines.

The GSC Power-Division Conical Valve Spring Kit (5075) is engineered to provide superior valvetrain stability for high-performance RB26 builds. By utilizing a conical profile, these springs reduce the reciprocating mass at the retainer end, which effectively shifts the harmonic resonance point higher in the RPM range. This design allows for increased engine speeds and improved valve control, especially when running aggressive camshaft profiles or high boost levels where standard springs may suffer from valve float.

• Conical spring design reduces valvetrain harmonics and mass
• Enhanced high-RPM stability and durability
• Direct fit for Nissan RB26DETT cylinder heads
• Manufacturer Part Number: 5075

Designed specifically for the Subaru EJ series engine, the GSC Power-Division Dual Conical Valve Spring Kit (MPN 5074) provides the valvetrain stability required for high-performance and high-RPM builds. This kit addresses the inherent harmonic challenges of the EJ platform by utilizing a specialized dual conical geometry.

The dual conical design offers progressive damping characteristics that significantly reduce harmonic resonance compared to traditional cylindrical springs. This ensures more consistent seat pressure and prevents valve float, protecting your engine during aggressive cam profiles or high-boost applications. By minimizing top-end mass while maintaining superior control, these springs allow for a higher rev limit and improved valvetrain longevity.

• Fits all Subaru EJ series engines
• Dual conical spring geometry for superior harmonic damping
• Increased seat pressure to prevent valve float at high RPM
• Engineered for high-performance street and track applications
• Manufacturer Part Number: 5074

The GSC Power-Division 5073 Single Conical Valve Spring Kit is engineered for Subaru EJ-series engines requiring improved valvetrain stability and high-RPM reliability. By utilizing a conical spring design, this kit reduces reciprocating mass at the retainer end and provides superior harmonic damping compared to traditional straight-wound springs.

This comprehensive upgrade includes lightweight, precision-machined titanium retainers to minimize valvetrain inertia, allowing for faster engine response and increased protection against valve float in high-performance applications. The included spring seats ensure correct installed height and alignment for a precise fitment.

• Fits Subaru EJ engines (EJ20/EJ25)
• Single conical spring design for reduced harmonics and reciprocating mass
• Precision-machined titanium retainers for maximum weight savings
• Includes dedicated spring seats for proper installation
• Manufacturer Part Number: 5073

Designed for high-performance Toyota 3SGTE engines, the GSC Power-Division High Pressure Conical Valve Spring Kit (5071) provides the necessary seat pressure and valvetrain stability for high-boost and high-RPM applications. This kit is specifically engineered for engines utilizing shimless or shim-over bucket configurations.

The conical spring design offers superior harmonic dampening compared to traditional cylindrical springs while reducing the reciprocating mass at the retainer end. This allow for a lighter titanium retainer and improved valve control during rapid lift cycles, preventing destructive valve float.

• High-pressure conical valve springs for increased RPM capability
• Lightweight CNC-machined Titanium retainers
• Compatible with shimless and shim-over bucket lifters
• Engineered for high-boost 3SGTE cylinder heads
• Manufacturer Part Number: 5071

Engineered for high-performance Nissan VR38DETT builds, the GSC Power-Division 5069 High Pressure Conical Valve Spring Kit provides the valvetrain stability necessary for high-boost and high-RPM applications. The conical spring design offers superior damping characteristics and reduced oscillating mass compared to traditional cylindrical springs, preventing valve float and ensuring consistent performance under extreme conditions.

This kit replaces the factory valvetrain components with high-seat-pressure springs capable of handling aggressive camshaft profiles and increased manifold pressure. The included precision-machined titanium retainers significantly reduce reciprocating weight, allowing for faster engine response and increased reliability at the rev limit.

• Specifically designed for the Nissan VR38DETT engine
• High-pressure conical spring architecture for improved harmonics
• Lightweight titanium retainers reduce valvetrain mass
• Prevents valve float in high-boost applications
• Manufacturer Part Number: 5069

Fits Nissan VR38DETT engines.

The GSC Power-Division Conical Valve Spring Kit is engineered to provide superior valvetrain stability and harmonics control for high-performance VR38DETT builds. Utilizing the advanced TVS1903 conical spring design, this kit reduces the oscillating mass at the retainer end, allowing for higher RPM limits and improved valve control compared to traditional cylindrical springs. This design offers the high-lift capabilities and seat pressure required for forced induction applications while maintaining a compact, lightweight profile.

• Engineered specifically for the Nissan VR38DETT valvetrain
• Includes TVS1903 series conical valve springs
• Conical geometry reduces top-end weight and improves harmonic damping
• Compatible with high-lift camshaft profiles
• Manufacturer Part Number: 5068

The GSC Power-Division conical valve spring and titanium retainer kit is engineered to provide superior valvetrain stability for the Toyota 3SGTE engine. This kit (MPN: 5067) utilizes a conical spring design that allows for a smaller, lighter titanium retainer, significantly reducing the reciprocating mass of the valvetrain while effectively managing harmonics at high RPM.

• Specifically designed for Toyota 3SGTE applications.
• Compatible with both shim-over-bucket and shimless bucket configurations.
• Conical spring geometry improves dampening and increases RPM potential.
• CNC-machined titanium retainers provide high strength and minimal weight.
• Includes a complete set of conical valve springs and titanium retainers.
• Manufacturer Part Number: 5067

Fits Toyota 2JZ-GTE engines.

This GSC Power-Division Single Conical Valve Spring and Titanium Retainer Kit is engineered to provide superior valvetrain control for high-performance Toyota 2JZ-GTE builds. The conical spring design effectively dampens harmonic vibration and allows for the use of a smaller, lighter titanium retainer. By significantly decreasing reciprocating mass at the valve, this kit enables higher RPM limits and more stable valve operation when running aggressive camshaft profiles.

• Direct fit for Toyota 2JZ-GTE engines
• Conical spring design reduces harmonic oscillation and spring surge
• Lightweight CNC-machined titanium retainers for reduced valvetrain mass
• Increased stability for high-lift and high-RPM applications
• Includes a complete set of springs and retainers
• Manufacturer Part Number: 5066

Engineered for high-performance Toyota 2JZ-GE and 2JZ-GTE engines, the GSC Power-Division 5064 Conical Valve Spring and Titanium Retainer Kit provides the valvetrain stability required for high-RPM and high-boost applications. The conical spring design reduces the reciprocating mass at the retainer end of the spring, which improves harmonic damping and allows for higher engine speeds without valve float.

• Fits Toyota 2JZ engines (2JZ-GE / 2JZ-GTE)
• Conical spring geometry for reduced valvetrain mass and superior harmonic control
• Includes CNC-machined aerospace-grade Titanium retainers for maximum strength and weight savings
• Designed to handle increased lift and cylinder pressures in modified builds
• Direct replacement for OE valvetrain components
• Manufacturer Part Number: 5064

Fits Mitsubishi 4B11T engines, including the Evolution X and Lancer Ralliart.

The GSC Power-Division 5062 High Pressure Single Conical Valve Spring and Titanium Retainer Kit is engineered for high-performance 4B11T builds that require increased seat pressure to manage higher boost levels and extended RPM ranges. By replacing the factory valve springs, this kit prevents valve float and ensures stable valvetrain operation under extreme engine loads.

The conical spring design provides superior harmonic damping compared to traditional straight-rate springs, while the lightweight titanium retainers reduce reciprocating mass for faster engine response. This combination allows for a more aggressive cam profile and higher redline without compromising valvetrain integrity.

• Engineered specifically for the Mitsubishi 4B11T engine
• High-pressure single conical spring design for improved harmonics
• Lightweight Titanium (Ti) retainers for increased valvetrain stability
• Critical for high-boost and high-RPM applications
• Manufacturer Part Number: 5062

Fits 2013-2017 Scion FR-S, Subaru BRZ, and Toyota 86 (FA20).

The GSC Power-Division Single Beehive Valve Spring Kit is engineered to provide superior high-RPM stability and valve control for the FA20 engine platform. By utilizing a beehive spring profile, this kit significantly reduces reciprocating mass at the retainer end, which helps dampen harmonic vibrations and prevents valve float during aggressive driving or high-lift cam applications.

This comprehensive kit includes lightweight titanium retainers for maximum strength-to-weight performance and hardened chromoly spring seats to ensure long-term durability and protect the cylinder head from spring wear. Each component is manufactured to strict tolerances to ensure a precise fit and reliable operation in performance-built engines.

• Manufacturer Part Number: 5056
• Beehive spring design for reduced mass and improved harmonics
• Lightweight Titanium retainers for high-RPM valvetrain stability
• Hardened Chromoly spring seats included
• Direct fit for the 2.0L FA20 engine

Fits select 2001-2015 Nissan and Infiniti models including 350Z, Altima, Maxima, Murano, Pathfinder, Quest, FX35, G35, I35, JX35, M35, QX4, and QX60 (VQ35DE).

The GSC Power-Division 5053 Beehive Valve Spring and Titanium Retainer Kit is specifically engineered for high-performance VQ35DE engines running high-boost turbo setups and increased RPM limits. The beehive spring architecture reduces valvetrain harmonics and provides better clearance for high-lift camshafts compared to standard cylindrical springs. Paired with precision-machined titanium retainers, this kit significantly reduces reciprocating mass to ensure stable valve operation and prevent engine-damaging valve float at high engine speeds.

• Optimized for Turbo High Rev VQ35DE applications
• Beehive spring profile for superior harmonic dampening and clearance
• Lightweight titanium retainers reduce valvetrain mass for high-RPM stability
• Ensures consistent valve control under high boost conditions
• Complete kit for comprehensive cylinder head upgrades
• Manufacturer Part Number: 5053

Fits 1989-1998 Nissan 240SX Base, LE, SE, and XE models equipped with SR20 engines.

The GSC Power-Division Single Valve Spring and Titanium Retainer Kit (MPN 5051) is a critical upgrade for enthusiasts looking to improve valvetrain stability and high-RPM reliability. Designed specifically for the Nissan SR20 platform, this kit replaces worn factory components to mitigate valve float and ensure precise valve timing during high-performance use.

• Includes high-seat-pressure single valve springs and lightweight titanium retainers
• Titanium retainers reduce reciprocating mass for improved valvetrain response
• Provides the necessary spring rate to support aggressive camshaft profiles and higher boost levels
• Direct replacement for OE valvetrain components in SR20 cylinder heads
• Manufacturer Part Number: 5051

Fits Honda K-Series K20 and K24 VTEC engines.

The GSC Power-Division Beehive Valve Spring and Titanium Retainer Kit (5047) is engineered to provide the valvetrain stability required for high-RPM operation and aggressive camshaft profiles. By utilizing a beehive spring design, this kit reduces the reciprocating mass of the valvetrain and offers superior harmonic dampening compared to traditional cylindrical springs. These components are essential for preventing valve float and ensuring long-term reliability in high-performance K-series builds.

• Advanced beehive spring geometry reduces active mass for improved high-RPM control
• CNC-machined titanium retainers offer maximum strength with minimal weight
• Designed specifically for Honda K20 and K24 VTEC valvetrain architectures
• Provides increased seat pressure and lift capacity for aftermarket camshafts
• Manufacturer Part Number: 5047
• Includes a complete set of valve springs and titanium retainers

Fits 2010-2014 Hyundai Genesis Coupe (2.0T).

The GSC Power-Division Beehive Valve Spring and Titanium Retainer Kit is engineered to provide the valvetrain stability necessary for high-performance G4KF Theta engines. By replacing the heavy factory components with this precision-matched set, you reduce reciprocating mass and improve harmonic resistance at high RPM. The beehive spring profile allows for a smaller, lighter retainer, while the titanium construction ensures maximum strength without the weight of steel, effectively preventing valve float in high-boost or high-revving applications.

• Engineered specifically for the Hyundai G4KF Theta engine
• Beehive spring design reduces mass and improves valvetrain harmonics
• Lightweight titanium retainers for superior strength-to-weight ratio
• Prevents valve float and ensures reliable seat pressure
• Manufacturer Part Number: 5046

Fits 1993-1998 Toyota Supra Twin Turbo models.

The GSC Power-Division (5044) Beehive Valve Spring and Titanium Retainer kit is designed to improve valvetrain stability and increase the RPM ceiling of the 2JZ platform. The beehive spring profile reduces reciprocating mass at the retainer, which helps mitigate valvetrain harmonics and allows for more aggressive cam profiles. Paired with lightweight, precision-machined titanium retainers, this kit provides the durability required for high-performance street and track builds.

Technical Note: Please verify the fitment of the spring base on your specific cylinder head before installation to ensure proper seating and component clearance.

• Manufacturer Part Number: 5044
• Spring Design: Beehive profile for reduced mass and harmonic control
• Retainer Material: High-strength Titanium
• Application: 1993-1998 Toyota Supra Twin Turbo (2JZ-GTE)
• Includes: Complete set of valve springs and titanium retainers

Fits select 1999-2015 Subaru Impreza, WRX, and STI models, and the 2005 Saab 9-2X Aero. This GSC Power-Division Beehive Valve Spring and Titanium Retainer Kit is engineered to enhance valvetrain stability in DOHC Turbo EJ platforms. By utilizing a beehive spring profile, this kit reduces reciprocating mass and improves harmonic resistance compared to traditional cylindrical springs, allowing for higher RPM potential and increased reliability under boost.

This kit is specifically designed to be used with the factory (OE) spring seats, simplifying the installation process while providing a significant upgrade in valve control. The included titanium retainers are CNC-machined for precision fitment and maximum weight savings without sacrificing durability.

• Fits DOHC Subaru Turbo EJ platforms
• Beehive spring design for improved harmonics and reduced weight
• Lightweight titanium retainers for faster engine response
• Designed for use with original equipment (OE) spring seats
• Includes 16 beehive valve springs and 16 titanium retainers
• Manufacturer Part Number: 5043

Fits select 2006-2015 Mitsubishi Lancer Evolution and Ralliart models (4B11T).

The GSC Power-Division Beehive Valve Spring and Titanium Retainer kit is engineered to provide superior valvetrain stability and increased RPM potential for the Mitsubishi 4B11T engine. By utilizing a beehive shape, these springs reduce reciprocating mass compared to traditional cylindrical designs while offering improved harmonic resistance. Each kit includes lightweight Grade 5 Titanium retainers designed to withstand the rigors of high-lift camshafts and high-boost environments.

This kit is designed for a drop-in installation using your factory OE spring seats, simplifying the upgrade process while maintaining precise seat pressure. It is an essential upgrade for built engines and high-performance street applications looking to prevent valve float.

• Manufacturer Part Number: 5042
• Spring Type: Beehive for reduced valvetrain mass
• Retainer Material: Lightweight Titanium
• Compatibility: Designed for use with OE spring seats
• Application: Mitsubishi 4B11T engines

Fits select 1990-2006 Mitsubishi Lancer Evolution, Eclipse, Galant VR-4, Eagle Talon, and Plymouth Laser (4G63).

The GSC Power-Division Beehive Valve Spring and Titanium Retainer Kit is designed to improve valvetrain stability and increase RPM potential in high-performance 4G63 engines. By utilizing a beehive spring profile, this kit reduces reciprocating mass and offers superior harmonic resistance compared to standard cylindrical springs. This design allows for higher lift and better valve control under extreme boost and high-revving conditions.

Each kit includes precision-engineered titanium retainers, which significantly reduce weight compared to factory steel units, further minimizing valvetrain inertia and protecting against valve float.

• Manufacturer Part Number: 5040
• Engine Compatibility: Mitsubishi 4G63 (Evolution 1-9 / DSM)
• Spring Style: Beehive
• Retainer Material: Lightweight Titanium
• Applications: Supports high-lift camshafts and high-RPM operation

Fits select 1990-2006 Mitsubishi Eclipse/Lancer Evolution/Galant VR-4, Eagle Talon, and Plymouth Laser models equipped with the 4G63T engine.

The GSC Power-Division Stage 1 Beehive Valve Springs (MPN 5039) are engineered to improve valvetrain stability and handle the increased demands of performance camshafts. These springs utilize a beehive design, which reduces the moving mass of the spring and provides better harmonic dampening compared to traditional cylindrical springs. This results in a valvetrain that can safely sustain higher RPMs without the risk of valve float.

Designed as a direct-fit upgrade, these Stage 1 springs are specifically manufactured to work with your engine's factory retainers and spring seats, simplifying the installation process while providing a significant boost in reliability over aged OE components.

• Manufacturer: GSC Power-Division
• Series: Stage 1 Beehive
• Part Number: 5039
• Compatibility: Replaces factory valve springs; uses OEM retainers and seats
• Engine Fitment: Mitsubishi 2.0L 4G63T