Spec 06-10 Subaru WRX/07-10 Legacy GT (including Spec B) Aluminum Flywheel

This product includes the SPEC SU20A aluminum flywheel, designed as a direct replacement for your 2006-2007 Subaru Forester and 2006-2007 Subaru Impreza. A flywheel's job is to store rotational energy from the engine, smoothing out power delivery between engine cycles and providing a surface for the clutch to engage with. Upgrading to an aluminum flywheel like this one can make a noticeable difference in how quickly your engine revs up and down.

The SU20A is constructed from aluminum, which is significantly lighter than a stock steel flywheel. This reduced mass means less rotational inertia, allowing your engine to accelerate and decelerate more freely. This can lead to a more responsive feel, especially during spirited driving or when you're shifting gears. While it's lighter, SPEC flywheels are well-built to handle the demands of daily driving and clutch engagement. It's important to note that when installing a lighter flywheel, you might notice a slight change in how the engine idles or how smoothly it recovers from a stall, as there's less mass to keep it spinning.

When replacing your flywheel, it's a good time to inspect your clutch components, including the clutch disc, pressure plate, and throw-out bearing, as these parts are all accessible during the job. Always refer to your vehicle's service manual for the correct installation procedures and torque specifications.