Fits 2016-present Cadillac CTS-V and Chevrolet Camaro ZL1.

This ATI Performance Products 9.34-inch supercharger pulley shell is engineered to increase boost pressure on LT4 engines by providing a 15% overdrive ratio. Designed to bolt onto an ATI Super Damper hub, this pulley spins the supercharger faster than the factory diameter, delivering a significant increase in airflow for higher horsepower and torque levels. The 8-groove design ensures maximum belt surface contact to prevent slip under high-load conditions.

• Diameter: 9.34 inches
• Belt Profile: 8-Groove
• Overdrive Rating: 15% Overdrive
• Material: High-strength precision-machined construction
• Compatibility: Requires ATI Super Damper hub for installation
• Application: 2016+ Cadillac CTS-V and Chevrolet Camaro ZL1 (LT4)

Fits 2014+ Chevrolet/GM LT1 and LT4 engines equipped with a dry sump oiling system.

This ATI Performance Products supercharger pulley shell is engineered to increase boost pressure by spinning the blower faster than the stock configuration. Designed for high-performance LT-series builds, this 9.40-inch pulley features an 8-groove (8-rib) belt profile and provides a 15% overdrive (OD) ratio. It is designed to bolt onto an existing ATI Super Damper hub, offering a precise fit and durable operation for track and street-performance applications.

• Pulley Diameter: 9.40 inches
• Belt Profile: 8-Groove (8-Rib)
• Overdrive Ratio: 15%
• Engine Compatibility: GM LT1 and LT4 (2014-Present)
• Oiling System: Dry Sump only
• Increases supercharger RPM for higher boost potential

Fits 2014-2024 Chevrolet and GMC vehicles equipped with LT1 or LT4 engines and dry sump oiling systems.

Increase boost pressure and optimize engine performance with this ATI 9.00-inch supercharger drive pulley. Engineered as a 10% overdrive component, this pulley increases the rotational speed of the supercharger relative to the crankshaft, providing a measurable gain in forced induction efficiency. The precision-machined 8-groove (8-rib) profile ensures maximum belt surface contact to prevent slip during high-RPM transitions. Designed specifically for dry sump configurations, this pulley maintains perfect belt alignment within the accessory drive system of the LT engine platform.

• Pulley Diameter: 9.00 inches
• Belt Profile: 8-Groove / 8-Rib
• Overdrive Rating: 10%
• Engine Compatibility: GM LT1 and LT4
• Oiling System: Dry Sump only
• Fitment Years: 2014-2024

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 2022-2025 Subaru BRZ and Toyota GR86.

The PERRIN Lightweight Water Pump Pulley is designed to improve throttle response by reducing the rotational inertia of your engine’s accessory system. By replacing the heavier factory pulley with this lightweight alternative, you decrease the parasitic drag on the engine, allowing it to rev more freely. This pulley is a direct bolt-on replacement that maintains factory belt alignment and works seamlessly with the OEM tensioner.

• Reduces rotational mass for improved engine response
• Direct replacement for the factory water pump pulley
• Vibrant red finish for customized engine bay styling
• Precision engineered for 2022-2025 BRZ and GR86 models
• Maintains original equipment belt routing and tension

This PERRIN crank pulley hub provides a precision-engineered interface for the rotating assembly on Subaru FA and FB series engines. Designed as a standalone hub with a small outer diameter (OD), this component is essential for specific performance pulley configurations or custom engine builds where exact tolerances are required to maintain accessory drive alignment.

• Engineered specifically for Subaru FA and FB engine platforms
• Precision-machined to ensure minimal runout and a secure fit on the crankshaft
• Small OD (Outside Diameter) profile for specialized application requirements
• Durable construction to withstand high-RPM operation and thermal stress
• Includes hub component only

Fits select 1993-2021 Subaru Impreza, WRX, and STI models configured without air conditioning. This PERRIN Lightened Crank Pulley is designed to reduce rotational mass and parasitic drag on the engine, allowing the crankshaft to spin up more quickly for improved throttle response and faster acceleration throughout the RPM range.

• Direct replacement for the heavy factory pulley to significantly reduce rotational inertia.
• Engineered for 1993-2014 Impreza, 2002-2014 WRX, and 2004-2021 STI models specifically without AC.
• Precision machined for perfect balance and consistent performance.
• Durable red finish provides long-lasting corrosion resistance and a custom look in the engine bay.
• Simple bolt-on installation using factory mounting points.

Fits 1993-2014 Subaru Impreza, 2002-2014 WRX, and 2004-2021 STI models without air conditioning.

The PERRIN Lightened Crank Pulley is designed to reduce the rotating mass on your crankshaft, allowing the engine to rev more freely and significantly improving throttle response. By replacing the heavy factory steel pulley with this lightweight aluminum alternative, you decrease parasitic drag on the engine for faster acceleration. This specific version is engineered for Subaru EJ-series engines where the air conditioning system has been removed or was not equipped from the factory.

• Precision CNC machined from 6061-T6 aluminum for maximum durability
• Weighs significantly less than the OEM pulley to reduce rotational inertia
• Black anodized finish provides a sleek look and superior corrosion resistance
• Direct bolt-on replacement for factory hardware
• Optimized for vehicles without an AC compressor or belt drive

Fits 2017-2021 Honda Civic Type-R (K20C1).

The PERRIN Performance Lightweight Crank Pulley is engineered to reduce rotational mass on the crankshaft, allowing the K20C1 engine to rev more freely and respond faster to throttle inputs. By replacing the heavy factory unit with this precision-machined aluminum component, you minimize parasitic drag and improve acceleration performance without compromising engine balance.

• CNC machined from high-strength 6061-T6 aluminum
• Red anodized finish for superior corrosion resistance and a custom aesthetic
• Significantly lighter than the stock OEM cast iron pulley to improve throttle response
• Precision balanced to maintain smooth engine operation across the RPM range
• Direct bolt-on replacement for the factory crank pulley

Fits select Toyota models equipped with 1JZ and 2JZ engines, specifically the JZX100 and JZZ30 chassis.

This GReddy Pulley Kit is designed to optimize engine performance by replacing heavy factory pulleys with precision-engineered units. By reducing rotational mass on the engine's accessory drive, this kit minimizes parasitic drag and allows the engine to rev more freely, resulting in improved throttle response and acceleration. These pulleys serve as a direct replacement for worn OE components, offering the durability and tight tolerances required for high-performance JZ-series builds.

• Brand: GReddy
• Engine Compatibility: Toyota 1JZ-GTE / 2JZ-GTE / 2JZ-GE
• Chassis Fitment: JZX100 (Chaser, Mark II, Cresta) and JZZ30 (Soarer)
• Kit Type: Performance Accessory Pulley Set
• Installation: Replaces factory drive pulleys

Fits select 2014-2021 Subaru WRX, Crosstrek, and Forester XT. This PERRIN Lightweight Water Pump Pulley is engineered to reduce rotational mass on the engine's accessory drive. By replacing the heavy factory pulley with this precision-machined lightweight alternative, you can improve throttle response and reduce parasitic drag on the powertrain.

Constructed for a perfect fit, this pulley installs directly onto the factory water pump mounting points without the need for custom modifications. The vibrant red finish provides a high-end custom look to the engine bay while resisting corrosion in harsh operating environments.

• Direct replacement for the OEM water pump pulley
• Reduced rotational mass for improved engine efficiency and response
• Precision machined for exact fitment and belt alignment
• Durable red finish for enhanced engine bay aesthetics
• Compatible with 2015-2021 Subaru WRX, 2018-2020 Crosstrek, and 2014-2018 Forester XT

Fits 2009-2015 Cadillac CTS-V (LSA).

This ATI supercharger drive pulley is engineered for the GM LSA engine, providing a 5% overdrive to increase blower RPM and boost pressure. Designed to bolt directly to an ATI Super Damper hub, this pulley ensures precise belt alignment and high-RPM stability for forced induction applications. It is precision-machined to exacting tolerances to maintain balance and reduce harmonic vibrations, protecting your engine's bottom end while maximizing performance.

• Manufacturer Part Number: ATI916105
• Pulley Diameter: 8.46 inches
• Belt Profile: 8-Rib
• Overdrive Ratio: 5%
• Compatible Engine: 6.2L LSA Supercharged V8
• Precision machined for perfect balance and durability

Fits select 2015-2024 Dodge Challenger/Charger SRT Hellcat, Durango SRT Hellcat, Jeep Grand Cherokee Trackhawk, and Ram 1500 TRX.

Increase your HEMI's boost and power output with the aFe POWER Supercharger Power Pulley Kit. By reducing the pulley diameter to 72.5mm (2.85 inches), this kit increases the supercharger's rotational speed, resulting in an approximate boost gain of 3 PSI (±.5). This two-piece design features a precision CNC-machined 6061-T6 billet aluminum pulley for reduced rotational mass and a high-strength 17-4 stainless steel hub for maximum durability and corrosion resistance.

Finished in a black hard-anodized coating with a laser-etched logo, this kit is engineered for a precise fit and a factory-level finish. Please note that installation requires a smaller belt (Gates K100572HD), special tools for removing the factory supercharger snout pulley, and custom ECU tuning to ensure safe engine operation.

• Pulley Size: Ø72.5mm (2.85”)
• Approximate Boost Increase: 3 PSI (±.5)
• Construction: 6061-T6 Billet Aluminum Pulley & 17-4 Stainless Steel Hub
• Finish: Black Hard Anodized with Laser Etched Logo
• Included Hardware: Screws, washers, and thread locker
• Required: Smaller Belt (Gates K100572HD) and ECU Tuning
• Manufacturer Part Number: 79-10007

Fits select 2015-2024 Dodge Challenger, Charger, and Durango SRT Hellcat models, Jeep Grand Cherokee Trackhawk, and Ram 1500 TRX.

Maximize the boost potential of your factory supercharger with the aFe POWER Pulley Kit. This 3.10-inch diameter pulley increases the spin rate of the supercharger, resulting in a boost increase of approximately 1.5 PSI (±.5). Precision CNC-machined for a perfect balance of lightweight performance and high-strength durability, this kit is an essential upgrade for 6.2L forced induction platforms.

The kit features a two-piece design, pairing a 6061-T6 billet aluminum pulley with a 17-4 stainless steel hub for superior corrosion resistance and structural integrity. The pulley is finished in a black hard-anodized coating for long-term wear resistance and features laser-etched sizing and branding. While this kit is designed to work with the factory belt, engine tuning is recommended to optimize performance gains.

• Pulley Size: 78.75mm (3.10")
• Boost Gain: Approximately 1.5 PSI (±.5)
• Pulley Material: CNC-Machined 6061-T6 Billet Aluminum
• Hub Material: CNC-Machined 17-4 Stainless Steel
• Finish: Black Hard-Anodized with Laser Etched Logo
• Installation: Requires special tools for factory pulley removal; professional installation recommended
• MPN: 79-10006

Includes: 3.10" Pulley, Stainless Steel Hub, Mounting Screws, Washers, and Thread Locker.

Fits 2002-2004 Acura RSX (Base and Type-S) and 2003-2005 Honda Civic Si.

The Weapon R Engine Torque Damper is a performance-grade shock absorber designed to stabilize the engine during aggressive driving. By mounting between the engine block and the vehicle chassis, this damper significantly reduces the engine movement and "torque twist" that occurs during hard acceleration, shifting, and cornering. This leads to improved power transfer to the wheels, more precise gear engagement, and reduced stress on your factory motor mounts.

Built for durability and consistency, the Weapon R damper helps eliminate wheel hop and cabin vibration while protecting drivetrain components from excessive shock. It installs using the included vehicle-specific mounting brackets and hardware for a secure fit.

• Manufacturer Part Number: 959-111-102
• Reduces engine movement to improve shifting feel and response
• Minimizes wheel hop for better off-the-line traction
• Decreases wear and tear on OEM engine mounts
• Includes all necessary brackets and hardware for installation

Fits 1996-2000 Honda Civic CX, DX, EX, GX, HX, LX, Si, and Value Package models.

The Weapon R Engine Damper is designed to stabilize your engine and improve power delivery by minimizing engine movement under high-load conditions. By acting as a shock absorber for the engine assembly, this torque damper reduces the stress on your factory motor mounts and helps eliminate wheel hop during hard acceleration. The result is more direct throttle response and cleaner shifting through every gear.

• Reduces engine vibration and torque movement for better traction
• Minimizes drivetrain shock to protect mounts and components
• Constructed for durability under high-performance driving conditions
• Includes all necessary mounting hardware for installation
• Manufacturer Part Number: 959-111-101

Fits select 2014-2026 Subaru WRX, Crosstrek, and Forester XT.

The PERRIN Lightweight Alternator Pulley is engineered to reduce rotational mass on the engine's accessory drive. By replacing the heavy factory steel pulley with this precision-machined aluminum component, you decrease parasitic drag, which results in faster throttle response and improved engine acceleration. It is a direct bolt-on upgrade that maintains factory charging performance while enhancing the aesthetics of your engine bay.

• Material: CNC-machined 6061-T6 aluminum
• Finish: Vibrant anodized Blue
• Reduces rotational mass for improved engine response
• Precision balanced to ensure smooth operation
• Direct replacement for the OEM unit
• Manufacturer Part Number: PSP-ENG-121BL

Fits select 2002-2020 Subaru Impreza WRX/STI, Forester XT, and Legacy GT models.

The Torque Solution Reversed Intake Manifold Alternator Relocation Bracket Kit (TS-SU-440BK-K) provides the necessary clearance required when reversing the orientation of your intake manifold. Reversing the manifold is a common modification for shortened intercooler piping layouts, but it typically creates interference with the factory alternator position. This kit relocates the alternator to clear the manifold while maintaining proper belt alignment and structural integrity.

• Designed specifically for reversed intake manifold configurations
• Precision-engineered mounting brackets for secure fitment
• Compatible with EJ-series engines found in WRX, STI, Forester XT, and Legacy GT
• Maintains reliable accessory drive operation
• Manufacturer Part Number: TS-SU-440BK-K

Fits select 2002-2017 Subaru Forester, Impreza, WRX, STI, and Legacy models.

The Torque Solution Lightweight Crank Pulley (TS-SU-207A) is engineered to replace the heavy OEM pulley, reducing rotational mass on the engine's rotating assembly. This reduction in weight allows the engine to transfer power more efficiently and improves throttle response throughout the RPM range by minimizing parasitic drag.

• Direct replacement for the factory crank pulley
• Significant reduction in rotational mass compared to stock
• Improves throttle response and engine acceleration
• Maintains factory belt alignment and geometry
• Manufacturer Part Number: TS-SU-207A

Fits 1998-2013 Porsche 911 (996 and 997) models with air conditioning, excluding Turbo engines.

The Torque Solution Underdrive Crank Pulley Kit is engineered to increase engine performance by reducing the parasitic drag caused by belt-driven accessories. By utilizing a smaller diameter pulley, the system slows down components like the alternator and AC compressor, freeing up lost horsepower and torque and delivering it directly to the wheels. This kit is a direct replacement for the factory crank pulley on naturally aspirated Porsche engines equipped with air conditioning.

• Reduces parasitic drag from accessories for increased power
• Precision machined for optimal balance and fitment
• Specifically designed for models with air conditioning (AC)
• Fits naturally aspirated 996 and 997 generation engines
• Excludes Turbo engine variants
• Manufacturer Part Number: TS-POR-458AC

Fits 1998-2011 Porsche 911 including Carrera, Targa, Turbo, GT2, and GT3 models.

The Torque Solution GT1 Engine Water Pipe Repair Kit (TS-POR-001) addresses a critical failure point in Porsche 996 and 997 cooling systems. Over time and through heat cycles, the factory-glued coolant pipes can loosen or eject from their housings, leading to catastrophic coolant loss and potential engine damage. This kit provides a robust solution to secure these fittings, ensuring the cooling system remains intact during high-performance street driving and rigorous track use.

• Prevents common coolant pipe separation and engine overheating
• Durable construction designed for high-heat automotive environments
• Essential maintenance for GT1-based engines and standard M96/M97 variants
• Includes components for a comprehensive cooling system reinforcement
• Manufacturer Part Number: TS-POR-001

Fits 2010-2016 Hyundai Genesis Coupe 3.8 models, including Grand Touring, R-Spec, Track, and Ultimate trims.

The Torque Solution Lightweight Water Pump, Crankshaft, and Alternator Pulley Combo is engineered to reduce rotational mass on your engine's rotating assembly. By replacing the heavy factory pulleys with these lightweight alternatives, you can improve throttle response and reduce parasitic power loss throughout the RPM range. These pulleys are precision-machined for a perfect fit and feature a vibrant red finish for lasting durability and a custom look in the engine bay.

• Direct replacement for factory water pump, crank, and alternator pulleys
• Reduces rotational mass to help the engine rev faster
• Lightweight design minimizes parasitic drag
• Vibrant red anodized finish for corrosion resistance
• Manufacturer Part Number: TS-GEN-006R

Fits 2022-2026 Subaru BRZ and Toyota GR86.

The PERRIN Lightweight Alternator Pulley (PSP-ENG-122RD) is designed to replace the heavy factory component, reducing rotational mass on the engine's accessory drive. By lowering the inertia of the rotating assembly, this pulley allows the engine to rev more freely, resulting in improved throttle response and decreased parasitic load.

This pulley is precision-machined for a perfect fit, ensuring proper belt alignment and tension on the 2022-2026 BRZ and GR86 platforms. The vibrant red finish provides a custom look under the hood while offering protection against the elements.

• Direct replacement for the factory alternator pulley
• Reduces rotational mass for improved throttle response
• Precision machined for optimal balance and belt tracking
• Anodized red finish for durability and style
• Manufacturer Part Number: PSP-ENG-122RD

Fits 2015-2026 Subaru WRX, 2015-2022 Crosstrek, and 2014-2018 Forester XT (FXT).

The PERRIN Lightweight Alternator Pulley is designed to reduce rotational mass on your engine's rotating assembly. By replacing the heavy factory steel pulley with this precision-engineered lightweight alternative, you decrease parasitic drag, which results in noticeably quicker throttle response and faster revving through the powerband.

• Direct replacement for the factory alternator pulley
• Reduces rotational mass for improved engine response
• Precision lightweight construction
• Vibrant Red finish for enhanced engine bay aesthetics
• Manufacturer Part Number: PSP-ENG-121RD

Fits 2015-2026 Subaru WRX, 2015-2022 Subaru Crosstrek, and 2014-2018 Subaru Forester XT.

The PERRIN Lightweight Alternator Pulley is designed to reduce rotational mass and parasitic drag on your Subaru engine. By replacing the heavy factory steel pulley with this CNC-machined aluminum component, you decrease the effort required for the engine to spin the alternator, resulting in noticeably faster throttle response and improved engine acceleration across the powerband. Weighing significantly less than the OEM counterpart, it provides a functional performance upgrade without compromising charging system reliability.

• Direct replacement for the factory alternator pulley
• Reduces rotational mass for improved throttle response
• CNC-machined from 6061-T6 aluminum
• Corrosion-resistant black anodized finish
• Precision balanced for vibration-free operation
• Manufacturer Part Number: PSP-ENG-121BK

Fits select 2006-2021 Subaru WRX, STI, and Forester models.

The PERRIN Lightweight Alternator Pulley (PSP-ENG-119RD) is engineered to reduce rotational mass on your engine's accessory drive. By replacing the heavy factory steel pulley with a precision-machined aluminum component, you decrease parasitic drag on the crankshaft, resulting in improved throttle response and faster engine revving.

• Precision CNC machined from 6061 aluminum for significant weight savings over the OEM unit
• Anodized red finish provides long-lasting corrosion resistance and a custom engine bay aesthetic
• Designed to maintain the factory diameter to ensure consistent alternator charging and proper belt tension
• Direct bolt-on installation using factory hardware
• Manufacturer Part Number: PSP-ENG-119RD

Fits select 2006-2021 Subaru WRX, STI, and Forester models.

The PERRIN Lightweight Alternator Pulley is engineered to reduce rotational mass on your engine's accessory drive. By replacing the heavy factory steel pulley with this precision-machined lightweight version, you decrease the energy required to spin the alternator, which translates into quicker throttle response and faster engine revving. Beyond the performance benefits, the vibrant blue finish provides a clean, custom look to your engine bay.

• Direct replacement for the factory alternator pulley
• Reduces rotational mass for improved engine response
• Precision machined for a perfect fit on the alternator shaft
• Durable blue anodized finish for long-lasting corrosion resistance
• Manufacturer Part Number: PSP-ENG-119BL

The PERRIN Lightweight Alternator Pulley is engineered to reduce the rotating mass of your engine's assembly. By replacing the heavy factory steel pulley with this lightweight version, you decrease parasitic drag on the drivetrain, resulting in faster throttle response and improved engine acceleration.

• Reduces rotational mass for improved engine response
• Durable black finish for long-lasting corrosion resistance
• Direct replacement for the OEM alternator pulley
• Manufacturer Part Number: PSP-ENG-119BK

Fits 2006-2014 Subaru WRX, 2007-2021 Subaru WRX STI, and 2006-2013 Subaru Forester.

Fits select 1993-2011 Subaru Impreza, WRX, and STI models. The PERRIN Lightweight Alternator Pulley is designed to reduce rotational mass on the engine's crank, allowing for faster revving and improved throttle response by lowering the moment of inertia. This component replaces the heavy factory steel pulley with a precision-engineered alternative that maintains standard charging system speeds.

• Precision CNC machined from 6061-T6 billet aluminum
• Red anodized finish for maximum corrosion resistance and engine bay aesthetics
• Significantly lighter than the OEM steel pulley to reduce parasitic drag
• Direct bolt-on installation using factory mounting hardware
• Manufacturer Part Number: PSP-ENG-118RD

Fits 1993-2011 Subaru Impreza, 2002-2005 WRX, and 2004-2006 STI.

The PERRIN Lightweight Alternator Pulley is designed to reduce rotational mass and improve throttle response by replacing the heavy factory steel pulley. By decreasing the parasitic drag on the engine, this pulley allows your Subaru boxer engine to rev more freely, providing a more connected driving experience without affecting charging system performance.

• Direct replacement for the factory alternator pulley
• Decreases rotational inertia for improved engine response
• Precision CNC-machined from 6061-T6 aluminum
• Corrosion-resistant black anodized finish
• Manufacturer Part Number: PSP-ENG-118BK