Designed for high-performance Audi and VW 1.8T 5-valve engines, this set of 12 Supertech exhaust valves is engineered to withstand the extreme thermal loads of forced induction. These valves are manufactured from Inconel, a high-nickel superalloy specifically chosen for its ability to maintain structural integrity at elevated exhaust gas temperatures (EGTs) that would fatigue standard stainless steel components.

Ideal for high-boost or track-driven 20V engines, these valves replace the factory units to provide superior heat resistance and reliability. Each valve is precision-machined to ensure a consistent seal and optimal flow within the cylinder head.

• Part Number: AEVI-1103-12
• Material: Inconel (High-Nickel Alloy)
• Valve Type: Exhaust
• Engine Application: 1.8T 5V (20-Valve)
• Quantity: Set of 12

Designed for the high-revving demands of the Ford 5.2L Voodoo engine, this Manley Race Master Series exhaust valve set provides the durability required for bracket, drag, and oval track racing. These valves are engineered specifically for engines operating under 8,000 RPM and are the recommended choice for exhaust applications in alcohol-fueled engines.

Each valve is constructed from high-temp XH-426 stainless steel to withstand extreme combustion temperatures. The Race Master design features a straight stem profile, swirl-polished underhead areas, and fully machined combustion faces to optimize exhaust gas flow and efficiency. To ensure long-term reliability and wear resistance, Manley incorporates chrome-plated stems and hardened tips.

• Fits Ford 5.2L Voodoo engines
• Head Diameter: 1.280 in
• Material: XH-426 Stainless Steel
• Series: Race Master (Straight Stem)
• Finish: Swirl polished underhead and machined combustion face
• Features: Chrome stems and hardened tips for superior wear resistance
• Manufacturer Part Number: 12631-8

The Manley Race Master Series Intake Valve Set is specifically engineered for the Ford GT350 Voodoo (5.2L) engine, providing the structural integrity required for bracket, drag, and oval track racing. Designed for high-performance applications operating under 8,000 RPM, these valves utilize the Race Master straight-stem profile to ensure reliability under extreme mechanical stress.

• Premium Construction: Manufactured from NK-842 stainless steel for superior durability and heat resistance in high-performance intake tracts.
• Optimized Airflow: Features swirl-polished under-head areas and fully machined combustion faces to maximize intake efficiency and flow velocity.
• Enhanced Longevity: Equipped with chrome-plated stems and hardened tips to resist wear and extend the service life of both the valves and guides.
• Application-Specific Design: Developed as a high-strength alternative to factory components for the Ford 5.2L Voodoo platform.
• Key Specifications: 1.508-inch head diameter; straight-stem Race Master shape; MPN 12630-8.

This Manley Race Master Series exhaust valve set is engineered specifically for Gen III Ford 5.0L Coyote modular engines. Designed to meet the requirements of bracket, drag, and oval track racing, these valves are optimized for engines operating up to 8,000 RPM and are the recommended choice for exhaust ports in alcohol-fueled racing engines.

Constructed from high-strength XH-426 stainless steel, these Race Master valves feature a straight-stem profile for consistent performance. To improve airflow and combustion efficiency, the under-head areas are swirl polished and the combustion faces are fully machined. Durability is further enhanced with chrome-plated stems and hardened tips to resist wear in high-stress valvetrain environments.

• Fits Gen III Ford 5.0L Coyote engines
• Valve Diameter: 1.260 in
• Material: XH-426 Stainless Steel
• Stem Style: Race Master (Straight Stem)
• Machining: Swirl polished under-heads and fully machined faces
• Stem Treatment: Chrome-plated stems with hardened tips
• RPM Rating: Up to 8,000 RPM
• Manufacturer Part Number: 12629-8

Engineered for the rigorous demands of bracket, drag, and oval track racing, the Manley Race Master Series Intake Valve Set is a professional-grade solution for Ford Modular Coyote 5.0L Gen III engines (5.0L) operating under 8,000 RPM. These valves provide the durability and flow characteristics required for high-performance builds, including those running alcohol fuel.

Each valve is manufactured from high-grade NK-842 stainless steel for superior heat resistance and structural integrity. The Race Master straight stem design features swirl-polished under-head areas and fully machined combustion faces to maximize intake airflow efficiency. To ensure longevity under high-stress conditions, Manley incorporates chrome-plated stems and hardened tips for exceptional wear resistance against valve guides and rockers.

• Series: Race Master (Straight Stem)
• Valve Type: Intake
• Material: NK-842 Stainless Steel
• Head Diameter: 1.485 in
• Stem Finish: Chrome Plated
• Face Design: Swirl Polished and Fully Machined
• Manufacturer Part Number: 12628-8

Optimized for high-performance Chevrolet LT1 (6.2L) engines, these Manley Race Series Race Flo intake valves are engineered for the rigors of bracket, drag, and oval track racing. Designed for engines operating at up to 8,000 RPM, these valves utilize the Race Flo shape to maximize intake charges and improve volumetric efficiency.

Each valve is constructed from NK-842 stainless steel to provide the thermal stability and tensile strength required for high-stress racing environments. The under-head areas are swirl polished and the combustion faces are fully machined to ensure smooth, unobstructed airflow. To ensure a long service life and consistent sealing, these valves feature hard tips and chrome-plated stems for superior wear resistance within the valve guides.

• Fits Chevrolet LT1 (6.2L) engines
• Manufacturer Part Number: 12348-8
• Series: Race Series (Race Flo shape)
• Head Diameter: 2.120 in
• Material: NK-842 Stainless Steel
• Finish: Swirl polished heads and chrome-plated stems
• Quantity: Set of 8 intake valves
• Engineered for applications under 8,000 RPM

Fits Chevy LT-1 (6.2L) engines.

Manley Pro Flo / Severe Duty Exhaust Valves are engineered to withstand the extreme thermal loads of high-output gasoline engines. Utilizing Manley's exclusive XH-428 stainless steel alloy, these exhaust valves offer significantly higher tensile strength than standard performance alloys. In rigorous fatigue testing at 1400°F and 40,000 psi, these valves maintained integrity for over 100 million cycles, providing a massive increase in service life over competing components.

Each valve in this set of eight features a swirl-polished underhead and a fully machined combustion face to optimize exhaust gas flow and combustion chamber efficiency. To ensure long-term reliability in high-RPM applications, the valves are finished with chrome-plated stems and hardened tips for superior wear resistance.

• Manufacturer Part Number: 12347-8
• Head Diameter: 1.590in
• Material: XH-428 Stainless Steel Alloy (Exhaust)
• Stem Construction: Chrome-plated stems with hard tips
• Finish: Swirl-polished underheads and machined faces
• Quantity: Set of 8

Fits Chevrolet LT1 engines (6.2L).

Manley Race Master series exhaust valves are specifically engineered for the high-load environments of bracket, drag, and oval track racing. Designed for engines operating at or below 8,000 RPM, these valves are built to withstand the extreme thermal demands of racing, making them the recommended choice for alcohol-fueled engines. Each valve is manufactured from XH-426 stainless steel for maximum durability and resistance to high combustion temperatures.

To maximize airflow and improve combustion efficiency, these valves feature swirl-polished under-head areas and fully machined combustion faces. The Race Master profile uses a straight stem design for consistent strength and stability. To ensure longevity and reduce friction, Manley incorporates chrome-plated stems and hardened tips to resist wear in demanding valvetrain configurations.

• Head Diameter: 1.590in
• Material: XH-426 Stainless Steel
• Stem Type: Race Master (Straight Stem)
• Finish: Swirl polished under-head with chrome stems and hard tips
• Quantity: Set of 8
• Manufacturer Part Number: 12345-8

Fits 2011 and newer Chrysler and Dodge models equipped with the 6.4L Hemi engine.

Manley Race Master valves are meticulously engineered to handle the rigorous demands of bracket, drag, and oval track racing. Designed specifically for engines operating at speeds up to 8000 RPM, these valves provide the thermal stability and durability required for high-performance applications. Constructed from XH-426 stainless steel, these exhaust valves are the recommended choice for alcohol-fueled engines where reliability is paramount.

• High-Grade Material: Manufactured from XH-426 stainless steel for exceptional heat and corrosion resistance.
• Optimized Airflow: Features swirl-polished under-head areas and fully machined combustion faces to improve efficiency.
• Wear Resistance: Equipped with chrome-plated stems and hardened tips for extended service life in high-stress environments.
• Precision Specs: 1.654" head diameter with a triple groove stem design.
• Race Ready: Straight stem Race Master profile designed for consistent performance across high-RPM cycles.
• Quantity: Set of 8 exhaust valves.
• MPN: 12331-8

Fits select 2011-present Chrysler and Dodge models (6.4L Hemi).

Manley Race Flo intake valves are engineered for the specific demands of bracket, drag, and oval track racing in engines operating under 8,000 RPM. These valves are constructed from NK-842 stainless steel for high-temperature durability and long-term reliability in high-performance environments.

Each valve features a swirl-polished under-head area and a fully machined combustion face to optimize airflow and efficiency. To ensure longevity, Manley incorporates chrome-plated stems and hardened tips for superior wear resistance. These valves utilize a triple-groove stem design for secure retainer fitment in Hemi cylinder heads.

• Manufacturer Part Number: 12330-8
• Valve Type: Intake
• Series: Race Flo
• Head Diameter: 2.140"
• Stem Style: Triple Groove
• Material: NK-842 Stainless Steel
• Finish: Chrome stems and hard tips
• Quantity: Set of 8

Fits select 2005-2008 Chrysler 300, Dodge Charger, Dodge Magnum, and Jeep Grand Cherokee (6.1L).

Manley Race Flo series intake valves are engineered for the high-demand environments of bracket, drag, and oval track racing. Designed for engines operating up to 8,000 RPM, these valves utilize NK-842 stainless steel construction to provide the heat resistance and structural integrity required for performance HEMI builds. Each valve features a swirl-polished under-head area and a fully machined combustion face to improve airflow and combustion efficiency.

To ensure long-term durability in high-performance valvetrains, Manley incorporates chrome-plated stems and hardened tips for superior wear resistance. This set includes eight 2.080-inch head diameter intake valves featuring a triple-groove stem configuration for precise fitment with factory-style or compatible aftermarket keepers.

• Material: NK-842 Stainless Steel
• Head Diameter: 2.080 in
• Stem Configuration: Triple Groove
• Shape: Race Flo (Optimized for airflow)
• Finish: Swirl polished under-head with chrome stems and hard tips
• MPN: 11668-8

Vehicle Fitment

Fits 1992-2010 Dodge Viper (V10).

Manley Race Master series intake valves are engineered for the high-stress environments of bracket, drag, and oval track racing. Specifically designed for engines operating at speeds up to 8000 RPM, these valves provide a durable and high-flow solution for the Viper V10 platform.

Constructed from high-strength NK-842 stainless steel, these valves feature a swirl-polished under-head area and a fully machined combustion face to optimize airflow and combustion efficiency. The chrome-plated stems and hardened tips ensure long-term wear resistance and consistent valve guide clearances under heavy racing loads.

• Manufacturer Part Number: 11644-10
• Series: Race Master (Straight Stem)
• Head Diameter: 2.020 in
• Valve Type: Intake
• Material: NK-842 Stainless Steel
• Quantity: Set of 10
• Finish: Swirl polished and fully machined
• Stem: Chrome-plated stems with hardened tips

Fits select 1992-2010 Dodge Viper models (V10).

Manley Race Master series exhaust valves are meticulously engineered to meet the rigorous demands of bracket, drag, and oval track racing. Optimized for engines operating under 8000 RPM, these valves are constructed from XH-426 high-quality stainless steel to ensure unparalleled durability in high-heat environments. This set of 10 is specifically recommended for alcohol-fueled engines and features a straight stem design.

• Manufacturer Part Number: 11643-10
• Series: Race Master (Straight Stem)
• Material: XH-426 Stainless Steel
• Valve Head Diameter: 1.600"
• Finish: Swirl polished underhead and fully machined combustion faces for maximum airflow efficiency
• Longevity: Chrome stems and hard tips for enhanced wear resistance
• Quantity: Set of 10

Fits Ford Coyote (5.0L) DOHC engines.

Manley Race Master series valves are engineered for the specific demands of bracket, drag, and oval track racing. Optimized for engines operating under 8000 RPM, these valves are the recommended choice for exhaust applications in alcohol-fueled engines, providing the thermal stability and durability required for high-stress combustion environments.

Each valve is constructed from high-grade XH-426 stainless steel and features swirl-polished under-head areas with fully machined combustion faces to improve airflow and efficiency. To ensure longevity in high-performance valvetrains, these valves include chrome-plated stems and hardened tips for superior wear resistance.

• Manufacturer Part Number: 11627-8
• Head Diameter: 32mm
• Stem Diameter: 5.96mm (0.2346 in)
• Overall Length: 4.274 in
• Material: XH-426 Stainless Steel
• Valve Shape: Race Master (Straight Stem)
• Quantity: Set of 8

Fits Ford Coyote 5.0L DOHC engines.

Manley Race Master valves are meticulously engineered for the rigorous demands of bracket, drag, and oval track racing. Designed specifically for engines operating under 8,000 RPM, these valves provide the durability and flow characteristics required for high-performance builds. They are the recommended choice for exhaust valves in alcohol-fueled engines, ensuring reliable performance under extreme thermal conditions.

Constructed from high-quality stainless steel, these Race Master straight-stem valves feature swirl-polished under-head areas and fully machined combustion faces to optimize airflow and efficiency. To ensure longevity, Manley incorporates chrome stems and hardened tips for superior wear resistance against guide and rocker friction.

• Part Type: Race Master Series Valves
• Material: High-quality stainless steel
• Head Diameter: 38mm
• Stem Diameter: 5.96mm
• Overall Length: 4.722"
• Finish: Swirl polished under-head and fully machined faces
• Stem: Chrome-plated with hardened tips
• Quantity: Set of 8
• Manufacturer Part Number: 11626-8

Fits Ford 5.0L Coyote DOHC 4V engines. Manley Race Master Series exhaust valves are purpose-built for the high-intensity environments of bracket, drag, and oval track racing. These valves are engineered for engines operating up to 8000 RPM and are specifically recommended for alcohol-fueled applications where valve seat and stem durability are critical.

Each valve is manufactured from XH-426 stainless steel for superior heat resistance. The design features a swirl-polished underhead area to optimize exhaust gas flow and a fully machined combustion face for maximum combustion efficiency. To ensure long-term reliability under race conditions, these valves include chrome-plated stems and hardened tips to resist wear and galling at the rocker interface.

• Manufacturer Part Number: 11623-8
• Series: Race Master (Straight Stem)
• Head Diameter: 31mm
• Stem Configuration: Triple Groove
• Material: XH-426 Stainless Steel
• Included: Set of 8 Exhaust Valves
• Construction: Swirl polished with chrome stems and hard tips

Fits Ford Coyote 5.0L DOHC 4-valve engines.

Manley Race Master series intake valves are engineered to meet the rigorous demands of bracket, drag, and oval track racing. These 37mm valves are the primary choice for high-performance engines operating at engine speeds up to 8,000 RPM. Featuring the "Race Master" straight-stem profile, these valves are manufactured from NK-842 stainless steel for exceptional heat resistance and structural integrity.

To optimize cylinder head flow, each valve features a swirl-polished under-head area and a fully machined combustion face. The stems are chrome-plated to reduce friction and wear within the guides, while the tips are hardened to withstand high-stress valvetrain cycles. This set of 8 uses a triple-groove design to ensure secure valve lock retention under load.

• Manufacturer Part Number: 11622-8
• Valve Series: Race Master (Straight Stem)
• Material: NK-842 Stainless Steel
• Head Diameter: 37mm
• Lock Style: Triple Groove
• Stem Type: Chrome-plated with hardened tips
• Processing: Swirl polished and fully machined
• Quantity: Set of 8

Fits select 2007-2008 Cadillac Escalade (Base, ESV, EXT), GMC Yukon Denali/XL 1500, and Hummer H2 models equipped with L92 cylinder heads.

Manley Race Flo valves are meticulously engineered for the rigorous demands of bracket, drag, and oval track racing. These intake valves are designed to optimize airflow and durability in Small Block Chevy engines utilizing LS3, L99, or L92 cylinder heads, providing a reliable solution for high-performance builds operating under 8,000 RPM.

• Series: Race Flo
• Part Number: 11620-8
• Quantity: Set of 8 Intake Valves
• Application: Small Block Chevy LS3 / L99 (L92 Head)
• RPM Limit: Engineered for engines operating under 8,000 RPM
• Construction: Optimized for high-stress racing environments

Fits 1999-2008 Ford GT, Mustang Shelby GT500, SVT Cobra, and SVT Cobra R (4.6L).

Manley Race Master Series exhaust valves are engineered for the high-stress environments of bracket, drag, and oval track racing. Designed specifically for engines operating up to 8,000 RPM, these valves provide the thermal stability and mechanical strength required for high-performance builds, including those utilizing alcohol fuels. Each valve is manufactured from XH-426 stainless steel to ensure long-term durability under extreme exhaust temperatures.

The Race Master series utilizes a straight-stem design with chrome-plated stems and hardened tips to minimize guide wear and resist mushrooming. To optimize cylinder head efficiency, these valves feature swirl-polished underhead areas and fully machined combustion faces, which promote smoother airflow and more consistent combustion cycles.

• Manufacturer Part Number: 11615-8
• Series: Race Master (Straight Stem)
• Material: XH-426 Stainless Steel
• Head Diameter: 30mm
• Stem Style: Triple Groove
• Finish: Swirl polished underhead with fully machined faces
• Construction: Chrome stems and hardened tips for wear resistance
• Compatibility: Recommended for exhaust applications in gasoline and alcohol engines

Fits select 2002-2012 Subaru Impreza WRX, WRX STI, and Saab 9-2X Aero models.

Manley Race Series exhaust valves are engineered to withstand the extreme thermal and mechanical stresses of high-performance EJ-series engines. These Race Master (Straight Stem) valves are specifically designed for applications operating under 8000 RPM, making them an ideal choice for bracket, drag, and oval track racers. Constructed from XH-426 high-temp stainless steel, these valves offer the durability required for turbocharged builds and are highly recommended for use in alcohol-fueled engines.

To maximize gas flow and efficiency, each valve features a swirl-polished under-head area and a fully machined combustion face. The stems are chrome-plated and equipped with hardened tips to ensure superior wear resistance and a long service life within the valve guide.

• Manufacturer Part Number: 11155-8
• Material: XH-426 Stainless Steel
• Valve Type: Race Master (Straight Stem)
• Head Diameter: 32mm
• Stem Construction: Chrome-plated with hard tips
• Finish: Swirl polished under-head and fully machined face
• Application: Rated for engines up to 8000 RPM

Fits select 2002-2012 Subaru Impreza WRX and WRX STI, and 2005-2006 Saab 9-2X Aero.

Manley Race Series intake valves are meticulously engineered to handle the thermal and mechanical stresses of bracket, drag, and oval track racing. Designed for engines operating at speeds up to 8,000 RPM, these valves are an essential upgrade for high-performance EJ-series builds. These valves feature the Race Flo shape, utilizing a specialized profile to optimize flow across the seat and into the combustion chamber.

Constructed from high-grade NK-842 stainless steel, Manley part number 11138-8 features swirl-polished under-head areas and fully machined combustion faces to maximize airflow efficiency. To ensure long-term durability and resistance to wear, these valves are finished with chrome stems and hard tips for superior compatibility with high-lift camshafts and heavy-duty valvetrain components.

• Head Diameter: 36mm
• Material: NK-842 Stainless Steel
• Stem Construction: Chrome-plated stems with hardened tips
• Face Design: Fully machined combustion face
• Profile: Race Flo for enhanced intake flow
• Manufacturer Part Number: 11138-8

Fits 1994-2005 Mazda Miata Base and LS models (1.8L).

Manley Race Master Series exhaust valves are engineered to meet the demands of bracket, drag, and oval track racing. Designed specifically for engines operating under 8,000 RPM, these valves provide the durability required for high-stress competition and are the recommended choice for exhaust applications in alcohol-fueled engines.

Constructed from XH-426 stainless steel, these valves feature a straight-stem Race Master profile. Each valve is swirl-polished under the head and has a fully machined combustion face to optimize airflow and efficiency. For long-term reliability, Manley incorporates chrome-plated stems and hardened tips to resist wear and friction within the valve guide.

• Manufacturer Part Number: 11101-8
• Material: XH-426 Stainless Steel
• Valve Diameter: 28mm
• Stem Style: Race Master (Straight Stem)
• Features: Swirl-polished underhead, fully machined faces, chrome stems, and hard tips
• Compatibility: Designed for Mazda 1.8L DOHC 16V (BP056) engines

Fits select 1992-2000 Honda Civic and Civic del Sol (EX / Si) models with D-Series engines.

Skunk2 Alpha Series valves are engineered for high-performance builds that require superior strength and optimized airflow without changing the stock valve size. Each valve is manufactured from a one-piece forging—using HNV3 martensitic steel for the intake and EV8 austenitic steel for the exhaust—and undergoes a proprietary heat-treatment process for exceptional durability under high-stress conditions. These valves feature hard chrome-plated stems to reduce friction and fully machined heads designed with specific profiles to maximize flow.

By utilizing advanced materials and precise machining, Skunk2 Alpha Series valves are 3-10g lighter than factory components, improving valvetrain stability and response. Whether rebuilding a street engine or a dedicated track car, these components provide the reliability needed for sustained high-RPM use.

• Manufacturer Part Number: 310-05-1600
• Intake Valve: 118.5mm Length, 30.00mm Head, 5.48mm Stem
• Exhaust Valve: 116.0mm Length, 26.00mm Head, 5.45mm Stem
• One-piece forged stainless-steel alloy construction
• Hard chrome plating and fully machined valve heads
• Standard compression stock sizing for direct replacement
• Weight: 3-10g lighter than stock

The Kleinn Vortex 4 Series Model 307 is a heavy-duty 12-volt electronic solenoid valve designed for high-performance air horn systems. Constructed with a robust all-brass valve body, it is engineered to maintain a leak-free seal under extreme pneumatic demands, supporting a maximum pressure of 175 PSI. This valve provides the high-flow capacity necessary for rapid activation and maximum volume in custom horn layouts or as a direct component upgrade.

• Direct Compatibility: Fits Kleinn compact air horns and train horn models 220, 500, 501, and 630.
• High-Pressure Performance: Rated for a maximum operating pressure of 175 PSI.
• Precision Fittings: Features a brass inlet fitting for 1/4" O.D. air tubing and a 1/4" Male NPT outlet.
• Durable Construction: Brass body with a chrome-finished solenoid housing for corrosion resistance and longevity.
• Electrical Specs: Standard 12-volt activation compatible with most automotive horn switch circuits.
• Manufacturer Part Number: 307

Fits Subaru EJ205, EJ207, and EJ257 engines.

Engineered for high-performance turbocharged applications, these GSC Power-Division exhaust valves are manufactured from a specialized Super Alloy material. This construction is specifically chosen to withstand the extreme thermal stresses and exhaust gas temperatures common in EJ-series builds. Each valve features a chrome polished finish to minimize friction and resist carbon buildup on the valve head and stem.

• Manufacturer Part Number: B2015-50
• Head Diameter: 32mm
• Material: Super Alloy (High-Heat Resistant)
• Finish: Chrome Polished
• Application: Subaru EJ205, EJ207, and EJ257
• Quantity: Set of 50 valves

Fits Subaru EJ205, EJ207, and EJ257 engines.

Designed for professional engine builders and high-volume shops, this bulk set of 50 GSC Power-Division P-D Series intake valves provides a reliable solution for cylinder head refreshes and standard rebuilds. These valves are engineered to meet factory dimensions while offering the durability required for turbocharged EJ-series applications.

Each valve features a chrome-polished finish to reduce friction within the valve guide and minimize carbon induction on the tulip, promoting consistent airflow and precise seating. As a standard (STD) size component with a 36mm head diameter, these valves install directly into the factory seats without the need for oversized machining.

• Manufacturer Part Number: B2012-50
• Valve Type: Intake
• Head Diameter: 36mm (Standard)
• Finish: Chrome Polished
• Quantity: Set of 50 Valves
• Compatible Engines: Subaru EJ205, EJ207, EJ257

Engineered for high-volume engine builders and professional machine shops, this bulk pack of 50 GSC Power-Division exhaust valves provides a consistent, high-quality solution for Subaru EJ205, EJ207, and EJ257 cylinder head assemblies. These valves are manufactured to standard (STD) head diameter specifications, making them an ideal choice for factory-spec refreshes and builds where original seat dimensions are maintained.

Each valve features a high-grade chrome polished finish. This specific treatment reduces friction within the valve guide and provides superior resistance to carbon buildup on the stem, which is critical for maintaining exhaust gas flow and valve seat integrity under the high thermal loads of a turbocharged EJ engine.

• Fits Subaru EJ205, EJ207, and EJ257 engines
• Standard (STD) head diameter for direct fitment
• Chrome polished finish for reduced stem friction and heat resistance
• Precision machined for reliable valvetrain geometry
• Bulk set includes 50 exhaust valves
• Manufacturer Part Number: B2011-50

Fits 2015-2023 Subaru WRX (FA20DIT).

GSC Power-Division oversized intake valves are engineered for high-performance builds requiring increased airflow and superior thermal resistance. These +1mm (35mm) valves provide a larger surface area to optimize intake charges on modified engines. Each valve is forged from high-tensile 21-4N stainless steel alloy, ensuring durability and corrosion resistance under extreme combustion temperatures and high-RPM stress.

• Head Diameter: 35mm (+1mm oversized)
• Material: 21-4N Stainless Steel Alloy
• Finish: Chrome polished stems and swirl-polished heads
• Reduced friction for improved valve guide longevity and airflow efficiency
• Sold as a complete intake set
• Manufacturer Part Number: 2284-8

Fits 2015+ Subaru WRX models equipped with the FA20F engine.

Improve your engine's exhaust flow and durability with this set of eight GSC Power-Division 23-8N series exhaust valves. Specifically engineered for the FA20F platform, these valves feature a 30mm head diameter, representing a +1mm oversize compared to factory units. This increased surface area allows for enhanced cylinder scavenging and improved performance in forced-induction applications where maximizing flow is critical.

• Chrome polished finish for reduced stem-to-guide friction and improved heat resistance
• 30mm head diameter (+1mm oversize) for optimized exhaust flow
• Precision-machined from high-strength alloys to withstand extreme combustion temperatures
• Designed specifically for the Subaru FA20F engine architecture
• Set includes 8 exhaust valves
• Manufacturer Part Number: 2283-8

Fits 2015-2023 Subaru WRX models equipped with the FA20F engine.

These GSC Power-Division intake valves are engineered to withstand the thermal and mechanical stresses of high-performance FA20F builds. Constructed from 21-4N stainless steel, these valves offer superior heat resistance and durability compared to standard OE components. This set features the standard (STD) 34mm head diameter, providing a precise fit for factory seat locations while maintaining optimal airflow characteristics for turbocharged applications.

• Material: High-strength 21-4N Stainless Steel
• Head Diameter: 34mm (Standard Size)
• Application: Subaru FA20F Intake Side
• Quantity: Complete Set of 8 Valves
• Manufacturer Part Number: 2282-8