Tomioka Racing Lightweight Water Pump Pulley - 2015-2021 Subaru WRX

Tomioka Racing Lightweight Water Pump Pulley - 2015-2021 Subaru WRX

The Tomioka Racing Lightweight Water Pump Pulley for the 2015-2021 Subaru WRX removes approximately 56% of the factory pulley's weight -- from 320 grams stock down to a significantly lighter aluminum unit.

56% Lighter Than Factory for Reduced Engine Load

The Tomioka Racing Lightweight Water Pump Pulley for the 2015-2021 Subaru WRX removes approximately 56% of the factory pulley's weight -- from 320 grams stock down to a significantly lighter aluminum unit. Reducing the rotational mass on engine accessories lowers the parasitic load on the engine, allowing it to accelerate more freely and respond more quickly to throttle inputs. CNC machined from 6061 T6 billet aluminum.

Direct Bolt-On for the FA20DIT

Designed specifically for the 2015-2021 Subaru WRX FA20DIT engine. Direct bolt-on replacement for the factory water pump pulley with no modifications required. Compatible with stock and aftermarket belts.

Fitment Notes

• Fits 2015-2021 Subaru WRX

Straight From Subispeed

The water pump pulley is one of the simplest rotational mass reductions available on the FA20 WRX. It's not a transformational modification, but it's a clean, well-made piece that contributes to the overall reduction in parasitic drivetrain load. Pair it with the alternator pulley and crank pulley for the full lightweight pulley package.

What's Included

• Tomioka Racing lightweight aluminum water pump pulley
• Mounting hardware

About Tomioka Racing

Tomioka Racing has been engineering bolt-on performance parts for Subaru platforms since 2007, with a design philosophy built around factory-style installation and real-world reliability. Every Tomioka Racing product is engineered to work with the factory setup -- clean installation, correct fitment, and durability under sustained use. For WRX, STI, BRZ, and the 86 platform, Tomioka Racing offers one of the most focused and thoroughly developed bolt-on catalogs available at this price point.