Underdrive

Aeromotive Inc. is a true high performance aftermarket manufacturer specializing in fuel delivery and fuel delivery components. Utilizing aerospace tolerances and procedures, three generations of track experience, and a meticulous approach to engineering, Aeromotive Fuel Systems has become the absolute pinnacle of performance fuel delivery.
28-tooth pulley.
28-tooth cog belt pulley; 3/8″ pitch;

Enhance your engine’s performance with our bolt-on aFe POWER Pulley kit. By changing the pulley diameter, you can adjust the spin rate of the supercharger, resulting in increased boost and amplified power. The aFe POWER Pulley kits are meticulously crafted to achieve a perfect equilibrium of lightweight design and high strength through precision machining. Count on our pulley kits for optimal functionality, a flawless fit, and an impeccable finish, ensuring a seamless boost to your engine’s power. Pulleys crafted from high-quality 6061-T6 billet aluminum showcase exceptional characteristics. Through precision machining, these pulleys achieve a remarkable balance of light weight and high strength, ensuring not only optimal functionality but also a perfect fit and finish. Our pulley kits featuring a 17-4 stainless steel hub, combining corrosion resistance and high strength through precision machining, ensuring a perfect fit, impeccable finish, and optimal functionality. Please note that special tools are required for removing the factory pulley from the supercharger snout, and we recommend professional installation for the kit to ensure seamless performance.
aFe POWER Supercharger Power Pulley Kit w/ Hub 3.10 IN Dodge Charger/Challenger Hellcat 15-23 V8-6.2L (sc)

• Boost increase by approximately 1.5PSI ±.5
• Includes Screws, Washers & Thread locker
• CNC Machined 17-4 Stainless Steel Hub
• CNC Machined 6061-T6 Aluminum Pulley
• Pulley Size: Ø78.75mm (3.10″)
• Laser Etched Logo and Sizing
• Black Hard Anodized Finish
• Smaller Belt Not Required
• Tuning is Recommended

AMS Performance 2022+ Subaru WRX Mud Flaps

Cobb All Subaru (Except 10+ Legacy Models) Black Lightweight Main Pulley

GO FASTER ? ADD LIGHTNESS, GFB’s Lightweight Pulley Kits offer sharper throttle response and faster acceleration by significantly reducing the rotating mass at the engine. Made from a single billet of 6061-T6 aluminium, then precision CNC machined to exacting tolerances, our pulley kits offer an exceptional bolt-on performance advantage without the need for supporting mods or tuning
Suits WRX/STi MY94-07, Forester MY98-07, Legacy MY03-07).
Subaru Suits WRX/STi MY94-07, Forester MY98-07, Legacy MY03-07)

• SHARPER THROTTLE RESPONSE AND “URGE”, ENGINE FEELS MORE LIVELY AND WILLING TO REV, UP TO 85% ROTATING INERTIA REDUCTION, WILL NOT CAUSE ENGINE DAMAGE, NO NEGATIVE EFFECTS ON DRIVEN ACCESSORY PERFORMANCE

Go Faster ? Add Lightness, GFB’s Lightweight Pulley Kits offer sharper throttle response and faster acceleration by significantly reducing the rotating mass at the engine. Made from a single billet of 6061-T6 aluminium, then precision CNC machined to exacting tolerances, our pulley kits offer an exceptional bolt-on performance advantage without the need for supporting mods or tuning
3-piece underdrive pulley kit (Crank, alternator & power steering pulleys & belts
Subaru 3-piece underdrive pulley kit (Crank, alternator & power steering pulleys & belts. Suits WRX/STi MY03-07, Forester XT MY03-08)

• SHARPER THROTTLE RESPONSE AND “URGE”, ENGINE FEELS MORE LIVELY AND WILLING TO REV, UP TO 85% ROTATING INERTIA REDUCTION, WILL NOT CAUSE ENGINE DAMAGE, NO NEGATIVE EFFECTS ON DRIVEN ACCESSORY PERFORMANCE

GO FASTER ? ADD LIGHTNESS, GFB’s Lightweight Pulley Kits offer sharper throttle response and faster acceleration by significantly reducing the rotating mass at the engine. Made from a single billet of 6061-T6 aluminium, then precision CNC machined to exacting tolerances, our pulley kits offer an exceptional bolt-on performance advantage without the need for supporting mods or tuning
Non-underdrive crank pulley
VW/Audi Golf GTI Mk5 (2.0t FSI engine)

• SHARPER THROTTLE RESPONSE AND “URGE”, ENGINE FEELS MORE LIVELY AND WILLING TO REV, UP TO 85% ROTATING INERTIA REDUCTION, WILL NOT CAUSE ENGINE DAMAGE, NO NEGATIVE EFFECTS ON DRIVEN ACCESSORY PERFORMANCE