MPC Twin Ceramic HD Clutch Kit. The new Competition Clutch Multi-plate Clutch Kit with Flywheel for Subaru WRX STI (4M-15030-1, 4M-15030-2) provides a drastic increase
in horsepower holding capacity with excellent drivability characteristics. The twin disc construction is tuned for maximum drivability. The
new clutch kit provides the ideal balance of sport driving and daily driving clutch use.
Many new features are responsible for these positive attributes. Twin 240mm full faced discs are used in conjunction with a performance
pressure plate, thereby providing additional friction area for enagement. The full faced discs are offered in either full faced organic or
segmented ceramic options. The standard "pull style" release system has been redesigned to utilize a hydraulic "push style" release system.
This provides a more consistent pedal feel and smoother load transfers between shifting engagements. The steel flywheel is CNC machined
and balanced. All clutch kits are provided with an alignment tool, pilot bushing and throw-out bearing.