The FX100 system from Clutch Masters for the Subaru STI uses a heavy-duty pressure plate with a custom heavy-duty steel sack srganic friction disc. This clutch is engineered for heavy-duty street use. It is specifically designed for extended wear and additional clamping force for the enthusiast who has added an exhaust system, an intake system, up to 50hp NO2 upgrade, or other non-forced induction external bolt-ons. It features only slightly increased pedal pressure, longer life than stock, and normal clutch feel during engagement and disengagement for a very smooth operation. Organic/ Kevlar/ Formula Button Clutch kits are expected and tend to have a higher life expectancy than OEM, however not guaranteed. Improper Installation, Driving style, performance upgrades, Break in procedure and light-weight flywheels will affect and have a role in determining the life expectancy of the clutch kit.