Fits select 1991-2005 Subaru Forester, Impreza, Legacy, and Outback, and 2005 Saab 9-2X models equipped with EJ20, EJ22, or EJ25 engines.

Designed for high-performance and race applications, this ACL main bearing set provides the durability required for increased loads and high-RPM operation. This specific set is engineered for EJ-series engine blocks where the thrust bearing is located in the #3 journal position. These bearings feature extra oil clearance to ensure a consistent oil film, reducing friction and protecting critical crankshaft surfaces during demanding driving conditions.

• Engine Compatibility: Subaru EJ20, EJ22, and EJ25
• Thrust Position: #3 Main Journal
• Size: Standard Size
• Series: High Performance with Extra Oil Clearance
• Application: Direct replacement for OE-style bearings in performance builds

Whether you are rebuilding a daily-driven WRX or a dedicated track engine, these ACL bearings provide the precision tolerances and material strength needed for a reliable bottom end.

Fits select 2006-2021 Audi and Volkswagen models with EA888 Gen 3 TFSI 4-cylinder turbo engines, including A3, A4, A5, S3, GTI, and Golf R.

Designed for high-performance and competition use, these ACL Race Series main bearings provide the durability required for increased power levels and high-RPM operation. This specific set is .25mm oversize, intended for use with crankshafts that have been machined or ground to restore surface finish and concentricity. The tri-metal construction features a steel backing for strength, a copper-lead intermediate layer for heat dissipation, and a lead-tin-copper overlay for superior embeddability and fatigue resistance.

• Series: Race Series
• Bearing Size: .25mm Oversize
• Material: High-strength tri-metal
• Engine Compatibility: EA888 Gen 3 TFSI 4-cylinder Turbo
• Application: Replaces worn factory main bearings during engine assembly

Fits select 1993-2006 Mitsubishi, Eagle, Hyundai, and Kia vehicles equipped with 4G63, 4G63T, and 4G64 7-bolt engines.

This ACL High Performance connecting rod bearing set is engineered for the rigors of high-output engines. Designed specifically for 7-bolt crankshaft configurations found in 2nd Generation DSMs and Evolution I-IX models, these bearings provide the durability required for high-RPM and high-load environments. These are 0.25mm (.010") undersize bearings, making them the correct choice for engine rebuilds where the crankshaft journals have been machined or ground to restore a perfect surface finish and maintain proper oil clearance.

• Compatible Engines: 4G63, 4G63T, 4G64 (7-bolt)
• Size: 0.25mm (.010") Undersize / Oversized Material
• Application: High-Performance / Competition
• Configuration: Replaces bearings in 1992-1997 flange main and 1997-on thrust washer setups
• Quantity: Complete set of 4 rod bearings

This ACL High Performance Rod Bearing Set is designed for engine builders and enthusiasts requiring precise tolerances and durability in high-load environments. Engineered as a standard size (STD) replacement, these bearings are suitable for 1st Gen DSM 6-bolt 4G63 and 4G64 builds, as well as a wide variety of Mitsubishi-sourced powerplants ranging from 1.2L to 1.8L. These bearings provide the essential oil clearance and load-bearing capacity needed to protect your rotating assembly during high-RPM operation.

• Fits select 1971-2006 Dodge, Eagle, Hyundai, Mitsubishi, and Plymouth vehicles.
• Engine Compatibility: 4G30, 4G31, 4G32, 4G33, 4G35, 4G36, 4G37, 4G61, 4G61T, 4G62, 4G63, 4G64, and G62BT.
• Engine Displacements: 1.2L, 1.3L, 1.4L, 1.5L, 1.6L, 1.7L, 1.8L.
• Size: Standard (STD).
• Configuration: Set of 4 bearing pairs for connecting rods.
• High-strength construction designed for performance and racing applications.

Fits select 2009-2018 Audi A6, A7, A8, Q5, Q7, S4, S5, and SQ5 models.

The APR Dual Pulley Kit maximizes boost pressure by increasing the supercharger's rotational speed by approximately 26.4% over stock. By upgrading both the drive and crank pulleys, this kit optimizes the blower's efficiency to deliver significant horsepower and torque gains across the entire powerband. This specific kit utilizes a press-on drive pulley design for a secure, factory-style fitment.

The included 57.75mm drive pulley is CNC machined from billet stainless steel and e-coated black for an OEM appearance, reducing the diameter from the 63.25mm stock unit. The 187mm crank pulley is CNC machined from lightweight billet aluminum with weight-saving pockets and an anodized black finish. It bolts directly to the existing factory harmonic balancer to maintain engine balance while increasing the pulley diameter from 162mm.

• Increases supercharger speed by 26.4% for maximum power gains
• 57.75mm billet stainless steel press-on drive pulley
• 187mm lightweight billet aluminum bolt-on crank pulley
• Retains factory harmonic balancer for engine longevity
• Includes replacement drive belt and new crank pulley bolts
• Requires APR Stage II+ Dual Pulley software (sold separately)
• Recommended for use with APR Ultracharger Throttle Body for maximum airflow

Fits 2017-2022 Chevrolet Silverado 2500 HD/3500 HD and GMC Sierra 2500 HD/3500 HD (6.6L).

The MAHLE Original cylinder head gasket set provides the precision-engineered seals required for a top-end engine overhaul or cylinder head service. Designed for the 6.6L Duramax diesel engine, this set replaces worn factory gaskets with OE-quality materials to ensure a leak-free seal across the intake and exhaust systems, valve covers, and secondary upper engine components.

This head set is specifically packaged without the cylinder head gasket, allowing technicians to select the specific gasket thickness or grade required for the engine build. Every component in this kit meets or exceeds original manufacturer standards for fitment, material integrity, and thermal resistance.

• Precision-cut for 2017-2022 GM 6.6L Duramax diesel engines
• Includes necessary upper engine gaskets and seals for a complete head service (excluding the head gasket)
• Manufactured using high-grade materials for superior heat and pressure resistance
• Direct replacement for factory seals to ensure proper engine sealing and long-term reliability

Fits select 2017-2024 Chevrolet Silverado 2500 HD/3500 HD and GMC Sierra 2500 HD/3500 HD (6.6L).

This MAHLE Original cylinder head gasket provides the critical seal required for the high-combustion pressures of the 6.6L Duramax L5P engine. Engineered to meet or exceed original equipment specifications, this gasket ensures reliable sealing between the cylinder head and engine block, preventing coolant and oil leaks while maintaining optimal compression. Whether you are performing a top-end rebuild or replacing a compromised factory seal, MAHLE Original components deliver the fit and durability necessary for heavy-duty diesel applications.

• Manufactured to precise tolerances for a drop-in, factory-style fit
• Designed specifically for the L5P Duramax engine architecture
• Resistant to extreme thermal cycling and high-pressure environments
• Maintains combustion seal integrity under heavy towing and high-load conditions
• Brand: MAHLE Original
• Engine Compatibility: 6.6L Duramax L5P Diesel

Fits select 2001-2016 Chevrolet Silverado and GMC Sierra 2500 HD/3500, Express and Savana 2500/3500, and 2006 Hummer H1 Alpha.

This Victor Reinz cylinder head gasket (left side) provides the critical seal required between the engine block and the cylinder head to maintain combustion pressure and prevent oil or coolant mixing. As an OE-supplier for sealing technologies, Victor Reinz engineers these gaskets to meet precise tolerances, ensuring they withstand the extreme thermal cycles and high pressures common in heavy-duty truck and van applications.

• Position: Left Side
• Manufacturer: Victor Reinz
• Direct replacement for the factory cylinder head gasket
• Engineered to maintain sealing integrity under high-stress conditions
• Constructed to original equipment specifications for reliable fitment

Fits select 2001-2016 Chevrolet Express 2500/3500, Silverado 2500 HD/3500, GMC Savana 2500/3500, Sierra 2500 HD/3500, and Hummer H1 Alpha.

This Victor Reinz cylinder head gasket is engineered to provide a reliable, leak-free seal for the right-hand cylinder bank. Designed to meet or exceed original equipment specifications, it effectively contains combustion pressures while preventing coolant and oil from mixing or leaking externally. Victor Reinz utilizes advanced materials and precise coating technologies to ensure durability under the extreme thermal cycles and high-pressure conditions found in heavy-duty truck and van engines.

• Direct replacement for the factory right-side head gasket to ensure proper engine compression
• Engineered to maintain critical sealing between the cylinder head and engine block
• Precision-manufactured to match OE thicknesses and port alignments for a reliable fit
• Designed for the demanding workloads of 2500 and 3500 series Chevrolet and GMC platforms
• Includes one right-side cylinder head gasket

Fits 2008-2014 Subaru WRX models.

The Torque Solution Fuel Pressure Regulator (FPR) Adapter allows for the removal of the factory fuel pressure regulator to facilitate the installation of a remote-mounted aftermarket regulator. This is a critical component for enthusiasts upgrading their fuel systems to support higher horsepower levels, where the stock regulator becomes a flow restriction or cannot be adjusted to meet increased fuel demands.

• CNC machined 6061-T6 billet aluminum construction
• Black anodized finish for superior corrosion resistance and durability
• Direct fitment to the factory fuel rail
• Includes Viton O-ring for a secure, leak-free seal
• Enables clean integration of aftermarket fuel lines and regulators

Fits 2015-2021 Subaru WRX.

The Torque Solution HD Oil Pickup is an essential upgrade for owners looking to safeguard their engine's lubrication system. In high-performance or track environments, the factory oil pickup can become a failure point due to vibration and thermal stress. This heavy-duty replacement is engineered to prevent fatigue-related failures, ensuring a consistent supply of oil to the FA20DIT engine and protecting against oil starvation.

• Heavy-duty thick-walled tubing construction for maximum durability
• Precision manufactured to maintain the factory pickup height and location
• TIG-welded assembly designed to withstand high-stress operating conditions
• Direct replacement for the OEM oil pickup
• Helps maintain consistent oil pressure during spirited driving

Maintain the integrity of your turbocharger's exhaust path with a genuine TiAL Sport 38mm Wastegate Gasket. Engineered to withstand the extreme thermal cycles found in high-performance exhaust systems, this gasket ensures a reliable, leak-free seal between the wastegate and its mounting flange, preventing boost control issues and exhaust leaks.

• Designed specifically for TiAL Sport 38mm external wastegates
• High-temperature material construction prevents premature failure and blowouts
• Precision-cut for an exact fit on standard 2-bolt wastegate flanges
• Essential for ensuring all exhaust gas is properly routed through the wastegate valve
• Direct replacement for worn or crushed gaskets during maintenance or turbo upgrades

The Z Locker Power Harness is a specialized wiring solution designed to integrate with the Tazer programmer ecosystem. This harness provides the dedicated power delivery required to engage electronic axle lockers independently of factory software restrictions. By installing this harness, you gain the ability to utilize your lockers in various drive modes as permitted by the Tazer interface, providing essential traction control for technical off-road maneuvers.

• Enables independent front and rear locker control when paired with a Tazer programmer
• Constructed with automotive-grade connectors for a secure, weather-resistant connection
• High-quality protective looming resists heat and abrasion in harsh under-vehicle environments
• Provides the necessary electrical path to bypass factory locker engagement limitations
• Direct integration with factory locker solenoids

Fits Toyota 7M-GTE 3.0L Turbo engines.

This Supertech single valve spring set is engineered to provide the consistent tension and fatigue resistance required for high-performance 7M-GTE builds. Replacing worn factory springs is a critical step when increasing boost or raising the RPM limit to prevent valve float, which can lead to loss of power or catastrophic engine damage. These springs are designed to provide improved harmonics and seat pressure stability compared to aged OE components, ensuring the valvetrain remains controlled under demanding conditions.

• Engineered specifically for the 24-valve Toyota 7M-GTE engine
• Spring Type: Single Valve Spring
• Quantity: Full set of 24 springs
• Manufacturer: Supertech Performance

Maintain valvetrain stability and prevent valve float with this Supertech Performance Single Valve Spring Set. Designed specifically for the Audi and Volkswagen EA113 and EA888 TFSI engine families, these springs are engineered to handle the increased stress of higher RPM ranges and aggressive camshaft profiles found in performance-oriented builds.

Upgrading to Supertech springs ensures consistent seat pressure and improved harmonic control compared to worn or factory-standard components. This is a critical upgrade for forced induction or high-revving applications where precise valve timing is essential to engine longevity and power delivery.

• Engine Compatibility: Audi/VW EA888 and EA113 TFSI
• Spring Type: Single high-performance valve spring
• Quantity: Complete set of 16 springs
• Application: Replaces factory springs for high-RPM or high-boost builds
• Benefits: Reduces risk of valve-to-piston contact and improves valvetrain response

These Supertech intake valves are engineered for the Subaru FA20F engine, offering the precision and durability required for high-performance valvetrain builds. Manufactured to exacting tolerances, these valves ensure consistent sealing and optimal airflow, making them an essential upgrade for engines facing the increased thermal and mechanical stresses of performance tuning or forced induction.

This complete set provides all eight intake valves needed for a full cylinder head service or build, replacing the factory components with high-strength alternatives designed for longevity and reliability.

• Engine Application: Subaru FA20F
• Valve Type: Intake
• Head Diameter: 35mm
• Stem Diameter: 5.46mm
• Overall Length: 105mm
• Quantity: Set of 8

Designed for high-performance BMW S52 engine builds, these Supertech forged pistons provide the structural integrity required for demanding track and street applications. This set is engineered specifically for the 3.2L S52B32 engine found in the E36 M3, featuring a precision-machined -12cc dish to achieve an 11:1 compression ratio.

• Fits 1996-1999 BMW E36 M3 (3.2L S52B32)
• Bore Diameter: 87mm
• Compression Ratio: 11:1
• Dish Volume: -12cc
• Engine Code: S52 / B32
• Quantity: Set of 6 pistons
• Note: Piston rings are not included and must be purchased separately.

Supertech pistons are manufactured from high-tensile strength alloys to withstand increased cylinder pressures and thermal loads. These are an essential upgrade for engine builders seeking to optimize the S52's power output while maintaining reliable tolerances.

Fits Mazda 2.3T turbocharged engines.

Supertech performance intake valves are engineered to withstand the elevated temperatures and cylinder pressures of high-output turbocharged applications. These valves undergo a specialized Black Nitride treatment, creating a hardened surface that significantly reduces friction and wear within the valve guides. The dish face and 6mm tapered stem design are optimized to improve airflow and volumetric efficiency, making these a critical upgrade for any Mazda 2.3T performance build.

• Head Diameter: 36.00mm
• Stem Diameter: 5.97mm
• Overall Length: 103.40mm
• Material: Black Nitride coated for reduced friction and high durability
• Stem Design: 6mm Tapered stem for improved flow characteristics
• Face Profile: Dish
• Quantity: Complete set of 8 intake valves

Optimize your valvetrain performance with this set of Supertech titanium locking pins, specifically engineered for Honda B-Series VTEC engines. These pins are critical components within the rocker arm assembly, responsible for the mechanical engagement of the VTEC system. By replacing the factory steel pins with high-grade titanium, you significantly reduce reciprocating mass in the valvetrain.

• Manufactured from aerospace-grade titanium for an exceptional strength-to-weight ratio
• Reduces valvetrain mass to improve high-RPM stability and responsiveness
• Precision-machined for a direct fit in Honda B16 and B18 VTEC cylinder heads
• Engineered to withstand the stresses of high-lift camshafts and racing applications
• Complete set of 8 pins for a full valvetrain service

Secure your valvetrain with the Supertech 6mm Single Groove Valve Lock Conversion. In high-performance and high-RPM applications, a single-groove lock configuration is preferred for its superior clamping force and ability to prevent valve stem fretting compared to traditional multi-groove designs. These locks provide the precise mechanical connection needed between the valve stem and retainer to handle increased spring pressures and aggressive cam profiles.

This set contains 24 individual locks, providing complete coverage for 12 valves at two locks per valve. Engineered from high-strength steel alloy, these components are essential for builders upgrading to performance valves and retainers requiring a 6mm single-groove interface.

• Stem Diameter: 6mm
• Groove Configuration: Single Groove
• Quantity: Set of 24 (Covers 12 valves)
• Material: Precision-machined high-strength alloy
• Installation: Requires 2 locks per valve

Fits 2001-2006 Honda K20A engines.

This Supertech Multi-Layer Steel (MLS) head gasket is engineered to provide a superior combustion seal for high-performance K20A builds. Constructed from multiple layers of high-grade stainless steel, this gasket offers exceptional durability and thermal conductivity compared to standard composite alternatives. The 87mm bore accommodates overbored blocks, while the 0.85mm thickness ensures consistent deck clearance and compression ratios for demanding street or track applications.

• Construction: Multi-Layer Steel (MLS) for maximum sealing pressure
• Bore Diameter: 87mm
• Thickness: 0.85mm
• Compatibility: 2001-2006 Honda K20A engines
• Application: High-compression or forced induction builds requiring precise tolerances

Proper valve lash is critical for valvetrain longevity and peak engine performance. This Supertech cam follower shim allows for precise clearance adjustments when building or maintaining high-performance overhead cam (OHC) cylinder heads. Precision-ground to exact tolerances, these shims provide the reliable, flat contact surface required between the cam lobe and the follower to ensure consistent timing and reduced wear.

• Diameter: 8mm
• Thickness: 1.95mm
• Component Type: Valvetrain Lash Shim
• Manufacturer: Supertech

Fits select 1994-2004 Dodge Ram 2500 and 3500 (5.9L).

The South Bend Clutch NV4500 1.375-inch Input Shaft Upgrade Kit is a critical modification for high-torque 5.9L Cummins diesel trucks. The factory input shaft in the NV4500 transmission is often a point of failure when engine output is increased or when hauling heavy loads. This kit replaces the standard factory shaft with a significantly more robust 1.375-inch diameter version, increasing the shear strength and overall durability of your drivetrain.

• Designed specifically for the NV4500 5-speed manual transmission
• Upgraded 1.375-inch shaft diameter for superior torque handling
• Replaces original smaller input shaft to support heavy-duty diesel clutch applications
• Engineered for high-performance tuning and heavy towing environments

Fits 2016-2021 Honda Civic (L15B7).

Maintaining a reliable seal between the cylinder head and engine block is critical for the turbocharged L15B7 engine, especially when pushing beyond factory boost levels. The Skunk2 Head Stud Kit replaces the standard factory head bolts with high-strength studs that provide superior clamping force and more consistent torque loading. This prevents the head lift that often leads to catastrophic gasket failure in high-performance or competition applications.

• Engineered specifically for high-horsepower and high-boost Honda L15B7 engine builds
• Manufactured from high-tensile strength alloy steel for maximum stretch resistance and durability
• Precision-rolled threads ensure accurate torque readings and prevent thread galling during installation
• Complete kit includes high-strength studs, hardened parallel-ground washers, and 12-point nuts
• Direct replacement for OE cylinder head bolts

Fits select 2004-2007 Ford F-250/F-350 Super Duty and 2004-2005 Ford Excursion (6.0L).

Sinister Diesel has re-engineered the Exhaust Gas Recirculation (EGR) cooler for the 6.0L Powerstroke to address the critical failure points of the factory unit. While the original Ford cooler relies on thin internal cooling fins and brazed connections that often crack and allow coolant to enter the intake manifold, this upgraded unit utilizes high-flow stainless steel tubing. Each cooler is precision TIG-welded and pressure-tested to ensure long-term reliability and prevent the catastrophic engine damage, such as hydro-locking or blown head gaskets, caused by OE cooler failure.

This cooler is a direct, drop-in replacement that installs in the factory location. The design allows for installation without removing the intake manifold, significantly reducing labor time. Finished in a durable Sinister Blue Cerakote, this unit is 50-state legal under CARB EO# D-721 and works flawlessly with the stock ECM or any aftermarket performance tuner.

• Stainless steel construction with high-flow internal tubing
• Precision TIG-welded and pressure-tested for maximum reliability
• Direct drop-in replacement for factory OE housing
• CARB EO# D-721 certified (50-state legal)
• Cerakote Sinister Blue finish for heat and corrosion resistance
• Compatible with stock and aftermarket tuning
• NOTE: Blue EGR Cooler is not available for sale in California

Fits 2023+ Ford F-250, F-350, and F-450 Super Duty models (6.7L) equipped with a short bed.

The Sinister Diesel Bed Step Delete kit is designed for owners who prefer a streamlined, traditional profile for their 2023 or newer Ford Super Duty. By removing the integrated factory side bed steps, this kit cleans up the truck's exterior lines and can provide necessary clearance for specific aftermarket bed accessories or styling preferences. Engineered for a precise fit, it replaces the OEM step hardware to ensure a finished appearance.

• Designed specifically for Short Bed configurations
• Removes factory-integrated side bed steps for a cleaner aesthetic
• Maintains the body lines of the 2023+ Ford F-Series Super Duty
• Direct-fit installation to replace factory step components

Fits 2005-2014 Ford Mustang (4.6L / 5.4L).

The SCT Performance Big Air mass airflow meter is engineered specifically for high-horsepower forced induction builds that exceed the metering range of factory sensors. Designed to prevent signal pegging, this slot-style MAF provides the precision needed for accurate tuning in both centrifugal and roots-style supercharger applications. It is compatible with either blow-through or draw-through configurations, offering a stable and reliable signal using OEM-quality calibration.

• High-precision slot-style MAF meter
• Centrifugal supercharger support up to 725 RWHP
• Roots-style supercharger support up to 825 RWHP
• Compatible with blow-through or draw-through intake setups
• OEM-quality calibration for consistent signal delivery

Fits 1999-2003 Ford F-150 (including Lightning and Harley-Davidson Edition) and 2003 Ford Mustang GT, Mach 1, and SVT Cobra.

The SCT Performance 90mm Mass Air Meter is engineered to resolve sensor "pegging" issues on high-horsepower Ford builds where factory air-mass sensors reach their voltage limits. Featuring a large 90mm bore inside a precision-machined billet aluminum housing, this meter provides the increased airflow capacity and resolution required for tuned engines. It is designed to reduce heat soak for more consistent air temperature readings and supports both blow-through and draw-through forced induction configurations.

• Large 90mm billet aluminum housing maximizes airflow and resists heat soak
• Supports up to 825 RWHP on Roots-style supercharger applications (up to 725 RWHP standard)
• OEM-quality calibration ensures reliable drivability and precise fuel trimming
• Compatible with both blow-through and draw-through intake setups
• High-resolution sensor prevents pegging common in modified F-150 and Mustang engines

Fits select 1999-2003 Ford F-150 and Mustang models.

The SCT Performance 90mm Mass Air Meter is engineered to eliminate the common issue of "pegging" in high-horsepower Ford EFI systems where the factory sensor reaches its maximum voltage limit. By utilizing a large 90mm billet aluminum housing, this meter provides a more stable airflow signal and significantly higher resolution than stock units. It is specifically calibrated to handle the increased demand of forced induction builds while maintaining OEM-quality idle stability and drivability.

• Precision 90mm billet aluminum housing reduces heat soak and maximizes airflow
• Supports up to 625 RWHP in centrifugal supercharger configurations
• Supports up to 700 RWHP in Roots-style supercharger configurations
• Versatile design supports both blow-through and draw-through air intake setups
• OEM-quality calibration prevents sensor saturation in high-output applications

This Rywire Mil-Spec engine harness is engineered specifically for rear-wheel-drive (RWD) converted K-Series engines utilizing 2002-2004 electronics. Built to professional motorsport standards, this harness replaces aging factory wiring with high-temperature Tefzel (ETFE) wire and Raychem DR-25 heat shrink, providing superior resistance to chemicals, abrasion, and heat.

The included chassis-specific adapter ensures a clean, reliable interface between the engine management system and the vehicle’s factory body harness. This eliminates the need for manual repinning and ensures all critical signals are maintained with high integrity. This harness is designed for a clean, tucked layout optimized for RWD engine bay configurations.

• Fits 2002-2004 K-Series RWD swaps (K20, K24)
• Constructed with aviation-grade Tefzel wiring
• Raychem DR-25 flame-retardant heat shrink tubing
• Includes chassis-specific adapter for plug-and-play integration
• New OEM-style connectors with high-quality terminals
• Designed for use with select aftermarket ECUs or modified factory units