Heavy duty pressure plate; steel-backed organic disc; smooth engagement. The Clutch Masters FX100 clutch is designed to be a dependable and economical alternative to Subaru's OEM replacement. The FX100 is made for the daily driven IS300s with basic bolt-ons. The Clutch Masters FX100 pressure plate offers 70% more clamping force over a stock WRX pressure plate. The 01-05 IS300 Clutch Masters FX100 disc is a steel-backed organic disc with the highest quality hub assemblies available to ensure durability and driveability.