Drivetrain› Clutches and Components

ACT Xtreme

Street Disc Clutch Kit

$699.00

SKU: SB4-XTSS

In Stock
In Stock
Ships by Jul 29
Free Shipping
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The ACT SB4-XTSS is an Xtreme Street Disc clutch kit designed for performance applications. It offers a 54% clamp load increase and a capacity of 567 lb/ft, with an estimated torque capacity of 598 ft-lbs. This kit is built for the 2004-2006 Subaru STi and is suitable for owners who track their daily driver.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandACT Xtreme
Part NumberSB4-XTSS
CategoryDrivetrain

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy