These GSC P-D valve guides are engineered to restore and maintain precise valve stem-to-guide clearances in high-performance BMW cylinder heads. Replacing worn factory guides is critical for preventing valve float, ensuring consistent seating, and maintaining efficient heat transfer from the valve stem to the cylinder head casting.

Designed for use in both intake and exhaust positions, these guides are machined to exacting tolerances to withstand the extreme thermal loads found in the N63 and S63 twin-turbocharged platforms. Whether you are performing a routine top-end refresh or a full performance build, these guides provide the stability required for reliable valvetrain operation.

• Fits BMW N63 and S63 engine platforms
• Compatible with both intake and exhaust valve positions
• Precision-machined for consistent inner and outer diameter tolerances
• Quantity: Set of 8 valve guides
• Manufacturer: GSC P-D

Fits 2009-2023 Nissan GT-R models equipped with the VR38DETT engine. This GSC Power-Division valvetrain kit is engineered specifically for high-performance race applications where valvetrain stability and weight reduction are critical.

The single conical spring design offers a lighter alternative to traditional dual-spring setups while providing superior harmonic damping. By reducing the mass at the top of the spring, this design minimizes harmonics and allows for higher RPM limits with better valve control during aggressive lift cycles. Paired with precision-machined titanium retainers, this kit significantly reduces valvetrain inertia, allowing for faster engine response and increased reliability under extreme racing conditions.

• Specifically engineered for the Nissan VR38DETT engine platform
• Single conical spring design for reduced reciprocating mass and improved harmonics
• High-strength titanium retainers for maximum weight savings and durability
• Optimized for dedicated race-only applications and high-lift performance camshafts
• Designed to maintain valvetrain stability at high engine speeds

Fits Mitsubishi 4G63 engines, including those found in the Lancer Evolution I-IX and DSM platforms.

GSC Power Division HP Beehive Titanium Retainers are engineered to handle the stresses of high-RPM valvetrain cycles in performance-built 4G63 heads. By utilizing a beehive profile, these retainers allow for a smaller, lighter top tool while maintaining the necessary seat pressure for high-boost and high-lift applications. The high-strength titanium construction significantly reduces reciprocating mass compared to standard steel retainers, allowing for increased engine response and improved valvetrain stability at the limit.

• Precision CNC-machined from aerospace-grade titanium for maximum strength-to-weight ratio
• Beehive design reduces mass at the most critical point of the valvetrain
• Engineered specifically for high-pressure (HP) spring configurations
• Compatible with Mitsubishi 4G63 16-valve cylinder heads
• Direct fitment for GSC Beehive valve spring kits

Fits 2018-2023 Ford Mustang models equipped with the Gen 3 Coyote 5.0L V8 and factory unported cylinder heads.

GSC Power-Division S1 Billet Camshafts are engineered to deliver significant power gains for the third-generation Coyote engine without requiring expensive cylinder head porting. These camshafts are CNC-machined from high-quality billet steel blanks, providing the structural integrity and precision lobe profiles necessary for high-RPM stability and long-term durability. The S1 profile is optimized to enhance the airflow characteristics of the factory head casting, making it an ideal choice for high-performance street builds and weekend track cars.

• Product Series: S1
• Construction: High-strength billet steel
• Duration: 290/300 degrees
• Compatibility: Designed specifically for use with OEM Unported Heads
• Engine Fitment: Ford Gen 3 Coyote 5.0L V8

GSC Power-Division S2 profile camshafts are engineered for high-horsepower BMW B58 builds that require increased lift and duration beyond factory limits. Specifically developed for Gen 1 B58 engines running upgraded turbochargers, these cams shift the power band higher into the RPM range to maximize top-end airflow and performance.

Each camshaft is precision CNC machined from high-strength billet steel to ensure structural integrity and lobe stability under the extreme stresses of high-boost applications. The 284/288 duration profile provides the necessary valve timing characteristics for large-frame turbochargers to reach their full power potential.

• Engine Compatibility: BMW B58 Gen 1
• Profile: S2 Series
• Material: CNC-machined billet steel
• Intake Duration: 284°
• Exhaust Duration: 288°
• Application Note: Designed for use with upgraded turbochargers

Secure your valvetrain with the GSC Power-Division (P-D) Valve Keeper Set, specifically designed for high-performance Nissan RB26 and Toyota 2JZ engines. These valve locks are critical components that keep the valve spring retainer securely fastened to the valve stem, preventing catastrophic engine damage during high-RPM operation or high-boost conditions.

Precision-machined to exacting tolerances, these keepers ensure a consistent and reliable fit. They are a direct replacement for worn factory hardware and are essential for any build utilizing upgraded valve springs and retainers where valvetrain stability is paramount. This complete set provides all 48 keepers required for 24-valve cylinder head assemblies.

• Direct fit for Nissan RB26 and Toyota 2JZ engines
• Complete set of 48 keepers (supports 24 valves)
• Precision-machined for maximum engagement and retention
• Engineered for high-RPM and performance valvetrain stability
• Maintains critical lock between valve stem and retainer

Fits 2006 Mitsubishi Evolution 9 models equipped with the 4G63T MIVEC engine.

GSC Power-Division R1R Rally Camshafts are specifically profiled for the unique demands of rally competition and restricted turbocharger applications. Engineered to maximize mid-range torque and improve throttle response, these cams are ideal for technical stages where quick turbo spooling is critical. CNC-machined from billet steel cores, they provide the structural integrity required for high-stress racing environments.

• Intake Duration: 260°
• Exhaust Duration: 268°
• Material: CNC-machined billet steel
• Compatible with factory MIVEC variable valve timing
• Optimized for restricted turbo classes and high-response setups
• Designed for Mitsubishi Evolution 9 4G63T platforms

Fits 2012-2021 Subaru BRZ and WRX, Scion FR-S, and Toyota 86 models equipped with the FA20 or FA20DIT engine.

The GSC Power-Division Dual Cylindrical Valve Spring Kit is engineered for high-performance Subaru FA20 engines that require superior valve control at elevated RPM levels. By utilizing a dual-spring design, this kit provides the necessary seat pressure and spring rate to prevent valve float, which is critical when running increased boost pressures or aggressive aftermarket camshaft profiles.

This kit is manufactured using premium-grade valve spring wire to ensure long-term durability and resistance to fatigue. The dual cylindrical configuration provides enhanced harmonic damping compared to single-spring setups, ensuring stable valvetrain operation throughout the powerband.

• Engineered specifically for the Subaru FA20 engine architecture
• Dual cylindrical spring design for maximum valvetrain stability
• Higher seat pressure to prevent valve float at high RPM
• Compatible with both naturally aspirated and turbocharged FA20 variants
• Precision-manufactured for consistent spring rates and tolerances

Fits 2005 Mitsubishi Lancer Evolution, Evolution MR, and Evolution RS models with the 4G63 engine.

The GSC Power-Division S2 camshafts (7008S2) are precision-engineered for the Mitsubishi Evolution 4G63 platform, delivering a substantial increase in power throughout the mid and high RPM ranges. These billet 274/274 duration cams are specifically designed for street and strip builds that require more aggressive lift and duration profiles than the S1 series while maintaining manageable driveability.

• CNC-machined from high-strength billet steel
• Duration: 274° Intake / 274° Exhaust
• Optimized for significant mid-to-top end power gains
• Engineered for street/strip performance applications
• Direct replacement for OE 4G63 camshafts
• Manufacturer Part Number: 7008S2

Engineered for high-horsepower racing applications, these GSC Power-Division S3 profile camshafts are specifically designed for the Hyundai Genesis Coupe 2.0L Turbo (G4KF). CNC machined from high-strength billet steel, these cams provide the timing and lift necessary for heavily modified forced induction setups that demand more than the S2 profile can offer.

With a 280-degree duration for both intake and exhaust, these S3 cams optimize top-end power delivery. Because of the aggressive lobe profile and increased lift, upgraded valve springs are strictly required for installation to maintain valvetrain control and prevent engine damage at high RPM.

• Fits Hyundai Genesis Coupe (2.0L Turbo G4KF)
• Profile: GSC Power-Division S3
• Duration: 280° Intake / 280° Exhaust
• Construction: CNC Machined Billet Steel
• Note: Requires upgraded valve springs
• Manufacturer Part: GSC-7043S3

Fits 2005 Mitsubishi Lancer Evolution, MR, and RS (V6-2.0L / 4G63).

Engineered for high-horsepower Mitsubishi 4G63 builds, the GSC Power-Division S3 series camshafts are designed for setups pushing 600 to 1,000+ horsepower. These 280-degree duration cams provide the aggressive lift and duration required for high-flow cylinder heads and large-frame turbochargers, significantly increasing top-end power without sacrificing the structural integrity of the valvetrain.

Each camshaft is CNC-machined from a high-quality billet steel core, ensuring superior profile accuracy and durability compared to cast alternatives. The S3 profile is optimized for competition use, requiring upgraded valve springs and professional tuning to maximize the performance of the 4G63 platform.

• Manufacturer Part Number: 7008S3
• Series: S3 Billet Camshafts
• Duration (Intake/Exhaust): 280 / 280 degrees
• Material: Billet Steel Core
• Compatibility: Non-MIVEC 4G63 Engines (Evo 4-8 style)

Fits 2018-2023 Ford Mustang models equipped with the Gen 3 5.0L Coyote engine and aftermarket ported cylinder heads.

The GSC Power-Division R3 camshaft set is engineered for high-performance applications where maximum airflow is required. These cams feature a 300/316 duration profile specifically optimized for Gen 3 Coyote engines that have undergone cylinder head porting. CNC-machined from high-quality billet steel, these camshafts provide the necessary strength and precision for high-RPM operation and increased lift profiles.

• Manufacturer Part Number: 7073R3
• Series: R3 Billet
• Duration: 300/316
• Designed specifically for engines with ported cylinder heads
• Billet steel construction for superior durability
• Required: Must be used with upgraded valve springs
• Compatibility: 2018-2023 Ford Mustang Coyote Gen 3

Fits 2005 Mitsubishi Lancer Evolution (Base, MR, and RS models).

GSC Power-Division R2 Billet Stroker Camshafts are specifically engineered for high-performance 4G63 engines utilizing larger displacement stroker kits. These R2 profile cams are optimized to handle the airflow requirements of 2.2L, 2.3L, and 2.4L builds, providing the necessary lift and duration to maximize power across the RPM range. Unlike standard cast cams, these are CNC-machined from high-quality billet steel cores for increased strength and reliability under the stress of high-lift racing applications.

• Manufacturer Part Number: 7008R2
• Series: R2 Stroker
• Construction: CNC-machined Billet Steel
• Designed specifically for stroker engine configurations
• Compatible with 2005 Mitsubishi Lancer Evolution models
• Engineered for high-RPM stability and valve train precision

Engineered for high-performance valvetrain stability, the GSC Power-Division (GSC P-D) Conical Valve Spring Set is designed specifically for the Porsche 991 Turbo. This set (MPN 5094) utilizes a conical profile to reduce the mass of the top retainer and improve harmonic resistance, ensuring consistent valve control at higher RPM levels and increased boost pressures.

By shifting the resonant frequency of the spring outside the engine's primary operating range, these springs minimize valve float and provide the durability required for aggressive camshaft profiles or high-output builds. The reduced reciprocating mass allows for faster valve response and improved valvetrain longevity under stress.

• Fits Porsche 991 Turbo models
• Conical design reduces retainer weight and reciprocating mass
• Enhanced harmonic damping to prevent valve float at high RPM
• Precision-manufactured for consistent seat and open pressures
• Manufacturer Part Number: 5094

Fits 1992-2001 Acura Integra GS-R/Type R, 1999-2000 Honda Civic Si, and 1994-1997 Honda Civic del Sol VTEC with B-Series VTEC engines.

The GSC Power-Division Dual Valve Spring Set and Titanium Retainer kit (MPN 5049) is engineered to manage the increased valvetrain demands of high-performance B-Series engines. By providing higher seat pressure and more consistent spring rates, this kit prevents valve float during high-RPM operation and supports the aggressive lift profiles of aftermarket camshafts. The included titanium retainers significantly reduce reciprocating mass compared to factory steel units, improving throttle response and valvetrain stability.

• Dual-spring configuration for superior harmonic control at high engine speeds.
• Precision-machined titanium retainers for reduced mass and high strength.
• Specifically engineered for Honda B16 and B18 VTEC cylinder heads.
• Manufacturer Part Number: 5049

Designed for the Nissan Skyline R32 and R33 equipped with the RB26DETT engine, these GSC Power-Division S2 camshafts are engineered to significantly increase power and torque throughout the mid-to-high RPM range. These cams are machined from high-quality billet steel for superior strength and durability compared to cast alternatives, making them ideal for high-boost applications.

The S2 profile features a 272-degree intake and 276-degree exhaust duration. This specific grind is optimized for street and track performance, providing a substantial increase in airflow while maintaining excellent drivability. A key advantage of the 7041S2 set is that it is designed to fit without requiring any clearancing or modifications to the cylinder head.

• Fits 1989-1998 Nissan Skyline R32 and R33 (RB26DETT)
• Intake Duration: 272°
• Exhaust Duration: 276°
• Material: Precision-machined billet steel
• Installation: No cylinder head modifications or machining required
• Manufacturer Part Number: 7041S2

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

Engineered for high-performance valvetrain stability, this GSC Power-Division Beehive Valve Spring and Titanium Retainer kit (MPN 5041) is a critical upgrade for 4G63T builds pushing higher RPMs and increased boost. The beehive spring profile uses a smaller, lighter retainer which reduces reciprocating mass, allowing for better valve control and resistance to float compared to traditional cylindrical springs.

• Beehive Spring Design: Reduces valvetrain weight and improves harmonic resistance for high-RPM reliability.
• Titanium Retainers: CNC-machined from aerospace-grade titanium for maximum strength with minimal mass.
• Engine Compatibility: Specifically designed for the Mitsubishi 4G63T 16-valve platform.
• Part Number: 5041

This kit includes a full set of performance beehive valve springs and matching titanium retainers, providing the seat pressure required for aggressive camshaft profiles and high-manifold pressure environments.

Fits Toyota 2JZ-GTE engines.

This GSC Power Division (GSC P-D) Super Alloy exhaust valve is engineered to withstand the extreme thermal loads and high-pressure environments typical of high-performance 2JZ-GTE builds. Replacing the factory exhaust valve, this standard-sized component is manufactured from a specialized Super Alloy for superior heat resistance compared to standard stainless steel options. The valve features a chrome polished finish to reduce friction and minimize wear on the valve guides, ensuring consistent performance during high-RPM operation.

• Engine Application: Toyota 2JZ-GTE
• Component: Exhaust Valve
• Head Diameter: 29mm (Standard)
• Material: Super Alloy high-temp construction
• Finish: Chrome Polished
• Quantity: Single (1) Valve
• Manufacturer Part Number: 2065-01

Designed specifically for high-output BMW B58 Gen 1.5 engines, the GSC Power-Division S2 Billet Camshafts (7095S2) are engineered to maximize top-end power. Featuring a 278/274 duration profile, these cams provide the increased lift and dwell required to optimize airflow in vehicles equipped with upgraded turbochargers and supporting modifications.

Each camshaft is CNC-ground from high-strength billet steel, ensuring superior material density and surface finish compared to cast alternatives. This set includes a precise intake trigger to maintain accurate timing synchronization with the factory ECU. These cams shift the power band higher into the RPM range, making them an essential upgrade for built B58 engines chasing high horsepower figures.

• Engine Compatibility: BMW B58 Gen 1.5
• Duration: 278 Intake / 274 Exhaust
• Material: CNC-machined billet steel
• Included: Intake trigger
• Recommended Application: Upgraded turbochargers and high-RPM performance builds
• Manufacturer Part Number: 7095S2

Fits 2003-2007 Dodge Viper models.

Engineered for high-performance applications, these GSC Power-Division valve guides are designed to replace worn OE components while providing superior thermal conductivity and wear resistance. Precise valve stem alignment is critical for maintaining valve seat integrity and ensuring the longevity of the Viper’s V10 cylinder heads. These guides are machined to exact tolerances, making them an essential upgrade for both standard refreshes and high-stress racing builds.

• Manufacturer Part Number: 3109-10
• Total Length (TL): 2.615 in
• Outer Diameter (OD): 0.5145 in
• Inner Diameter (ID): 0.311 in
• Application: Intake or Exhaust
• Quantity: Set of 10

Fits select 1990-2006 Mitsubishi, Eagle, and Plymouth models with the 4G63 engine, including Lancer Evolution VIII/IX, Eclipse GST/GSX, Galant VR-4, and Talon TSi.

GSC Power-Division Zero-Tick Lifters are engineered to eliminate the common valvetrain noise or "ticking" associated with the original equipment hydraulic lash adjusters in the 4G63 engine. These lifters feature a redesigned internal structure and an enlarged 3mm oil passage to improve lubrication and prevent the air entrapment that causes traditional lifter bleed-down. Whether you are performing a standard timing belt service or a full head build, these lifters provide more consistent valve clearance for quieter operation and reliable high-RPM performance.

• Solves common 4G63 lifter tick issues
• Enlarged 3mm oil hole for superior lubrication and air bleeding
• Maintains consistent hydraulic pressure to stabilize valvetrain
• Precision-machined direct replacement for OE components
• Manufacturer Part Number: 4042

Eliminate the common valvetrain noise associated with worn factory lash adjusters with the GSC Power-Division Zero-Tick hydraulic lifter. This high-quality component is designed to maintain consistent oil pressure and precise valvetrain clearance, effectively resolving the signature "lifter tick" that often affects high-mileage or performance-built engines.

• Specifically engineered to eliminate hydraulic lash adjuster noise in 4G63 engines
• Precision-manufactured to maintain proper oil retention and valvetrain tolerances
• Direct replacement for factory hydraulic lifters
• Manufacturer Part Number: 4042-1
• Sold individually (Note: 16 required for a full engine refresh)

Fits Mitsubishi 4G63 engines found in the Lancer Evolution I-IX, and 1990-1999 Mitsubishi Eclipse, Eagle Talon, and Plymouth Laser.

Fits 2011-2017 Ford Mustang and F-150 models equipped with 5.0L Coyote Gen 1 and Gen 2 engines.

This GSC Power-Division valve guide set is engineered for high-performance Ford 5.0L Coyote Gen 1 and Gen 2 cylinder heads. These standard (STD) bore guides serve as precision replacements for both intake and exhaust positions, maintaining tight tolerances for valve stem stability and optimal heat dissipation. Each guide features an integrated stopper flange, which acts as a positive mechanical stop during the press-in process to ensure perfectly consistent installation depth across all 16 ports.

• Designed specifically for Ford 5.0L Coyote Gen 1 and Gen 2 platforms
• Standard (STD) outer diameter for factory-spec fitment
• Integrated stopper ensures precise, repeatable installation height
• Universal design for both intake and exhaust valve positions
• Manufacturer Part Number: 3130-16
• Sold as a complete set of 16

Fits 1988-1995 Toyota Celica All Trac and MR2 Turbo models equipped with the 3SGTE engine.

The GSC Power-Division valve spring and titanium retainer kit (MPN: 5745) is engineered for high-performance builds requiring superior valvetrain stability at high RPMs. This kit is specifically designed for compatibility with shimless and shim-over-bucket configurations. By utilizing lightweight titanium retainers, this set reduces reciprocating mass, helping to prevent valve float and ensuring consistent performance under high boost pressures.

• Precision-wound valve springs for optimized seat pressure and engine reliability
• Lightweight titanium retainers to reduce valvetrain inertia and improve response
• Specifically compatible with shimless and shim-over-bucket setups
• Direct fit for the Toyota 3SGTE cylinder head
• Manufacturer Part Number: 5745

Fits Ford Mustang Gen 3 Coyote (5.0L) engines.

These GSC P-D intake valves are precision-engineered for the Gen 3 5.0L Coyote platform. Each valve features a 37.6mm standard (STD) head diameter and a high-grade chrome polished finish to reduce friction and minimize carbon buildup. Designed for superior durability and heat resistance, these valves are an essential upgrade for high-RPM applications where valve train stability and consistent airflow are critical.

• Manufacturer Part Number: 2162-8
• Head Diameter: 37.6mm (Standard)
• Finish: Chrome Polished
• Engine Compatibility: Ford 5.0L Coyote Gen 3
• Quantity: Set of 8 valves

Fits 1988-1995 Toyota Celica All Trac and MR2 Turbo with the 3SGTE engine.

GSC Power-Division manganese bronze exhaust valve guides are engineered to replace worn or underperforming OE components in high-stress turbocharged applications. Manganese bronze is selected for its superior thermal conductivity compared to standard cast iron, allowing for more efficient heat transfer away from the valve stem. This material also provides excellent natural lubricity, reducing friction and extending the service life of both the valve and the guide.

CNC machined to precise tolerances, these guides ensure consistent valve stem-to-guide clearance, which is critical for maintaining proper valve seat alignment and sealing in high-performance 3SGTE builds. This set is specifically designed for the exhaust side where heat management is most critical.

• Material: High-quality Manganese Bronze for enhanced durability and heat dissipation
• CNC machined for exact fitment and finish
• Designed for high-boost and high-temperature exhaust environments
• Complete set of 8 exhaust valve guides
• Manufacturer Part Number: 3033-8

Improve cylinder head reliability and thermal efficiency with this set of eight GSC Power-Division Manganese Bronze valve guides. Specifically engineered for Subaru SOHC EJ25 engines, these guides are an essential upgrade for high-performance builds or any refresh where precision tolerances and long-term durability are required.

Constructed from a high-strength manganese bronze alloy, these guides offer superior thermal conductivity compared to factory cast iron units, effectively drawing heat away from the valve stems. The material's natural lubricity reduces friction, minimizing wear on both the guide bore and the valve stem. These guides feature a "stopper style" (shouldered) design, providing a physical stop that prevents the guide from migrating or dropping into the port during extreme thermal cycles or high-RPM use.

• Fits Subaru SOHC EJ25 engines
• Application: Intake and Exhaust valve positions
• Material: Precision-machined Manganese Bronze
• Design: Stopper style with integrated shoulder
• Quantity: Set of 8 guides
• Manufacturer Part Number: 3019-8

Fits select 2013-2021 Subaru BRZ, Scion FR-S, and Toyota 86 models equipped with the FA20 engine.

GSC Power Division stopper-style intake valve guides are engineered to replace worn factory components in high-performance FA20 cylinder heads. Machined from high-grade proprietary manganese bronze, these guides offer superior heat dissipation and wear resistance compared to standard OEM materials. The integrated stopper shoulder ensures precise installation depth every time, preventing the guide from migrating during high-RPM operation or extreme thermal cycles.

These guides are finished to standard (STD) bore specifications, providing the necessary stability for the valve stem to maintain a consistent seal and seat geometry. Ideal for both street performance and dedicated track builds, these components are a critical upgrade during any cylinder head refresh.

• Part Number: 3106-8
• Location: Intake side
• Sizing: Standard (STD) outer diameter
• Material: High-strength manganese bronze
• Quantity: Complete set of 8 guides

These GSC Power-Division manganese bronze exhaust valve guides are engineered for high-performance Nissan VK56 engine builds. Replacing factory cast iron guides with manganese bronze provides significantly better heat dissipation and superior lubricity, reducing the risk of valve sticking or premature wear under high-RPM or high-temperature conditions.

• Material: High-quality Manganese Bronze for improved thermal conductivity and wear resistance.
• Application: Precision machined specifically for Nissan VK56 engine exhaust ports.
• Installation: Designed to replace worn OE guides; professional machining and sizing required during installation.
• Quantity: Complete set of 24 exhaust valve guides.
• Manufacturer Part Number: 3047-16

Fits 2021+ BMW M3 (S58).

The GSC Power-Division S3 Billet Camshafts are designed for maximum-effort S58 builds where top-tier airflow is the priority. Featuring an aggressive 292/300 duration profile, these billet cams are specifically engineered for engines running upgraded turbochargers and ported cylinder heads. These camshafts provide the necessary lift and timing to maximize the power potential of the BMW S58 platform in high-horsepower applications.

• CNC machined from high-quality billet cores for superior strength and precision
• Duration: 292 Intake / 300 Exhaust
• Includes integrated intake trigger for proper timing synchronization
• Optimized for use with upgraded turbos and ported cylinder heads
• Manufacturer Part Number: 7093S3