Exedy Lightweight Flywheel – 2004-2021 Subaru STI

Exedy Lightweight Flywheel, 2004-2021 Subaru WRX STI

The Exedy Lightweight Flywheel for the 2004-2021 Subaru WRX STI is a chromoly steel flywheel engineered for the EJ207/EJ257 6-speed platform. The reduced mass improves throttle response and complements the STI’s performance character, a natural companion to any clutch upgrade on this platform.

DETAILS

• Material: high-strength chromoly steel
• Significantly lighter than OEM cast iron flywheel
• Improved throttle response and engine revving on EJ257
• 6-speed fitment, 2004-2021 STI
• Engineered to work with Exedy clutch kit range

The STI’s EJ257 produces significant torque and rev range, reducing the flywheel mass enhances both the feeling of torque delivery and the speed at which the engine transitions between RPM levels. The result is a more responsive engine character that suits the STI’s performance driving intent.

The Exedy flywheel is machined for correct engagement with Exedy clutch discs, the friction surface preparation and geometric tolerances are matched to the Stage 1 through Stage 4 clutch systems. Installing the Exedy flywheel alongside an Exedy clutch kit provides a complete drivetrain solution from a single manufacturer with consistent engineering standards.

What’s in the Box

• Exedy lightweight flywheel
• Flywheel bolts

Why Choose Exedy

Exedy is the world’s largest clutch manufacturer and the OEM supplier to more than six major vehicle manufacturers globally, including Toyota, Honda, Subaru, and Mitsubishi. Every Exedy performance clutch is designed and manufactured as a purpose-built performance component, not a modified OEM part, not a remanufactured unit, but an engineered system built specifically for performance use from the ground up. Exedy’s research and development happens on actual race programs alongside their road car product development, meaning the technology that wins championships filters directly into the street performance catalog. When you install an Exedy clutch, you are installing a product from the company that builds the OEM clutch for the car it is replacing.

The RallySport Take

The Exedy lightweight flywheel for the 2004-2021 STI is the correct companion to any Exedy clutch installation on this platform. Do the flywheel when you do the clutch, the incremental cost and labor to return later is not justified. Fits the 2004-2021 Subaru WRX STI with EJ207/EJ257 6MT.

Fitment