i second that. blew 1200.00 on an STI clutch, clutch cover and flywheel only to find that the setup was totally non streetable and a total pain in the ass as far as engagement/shudder. ran it for 3 days, paid for a new OEM wrx clutch and flywheel, and then paid for a second installation within 3 days of the sti clutch install. total cost was about 3,000.00 factoriing in both installs and in the end all i have is a stock clutch and a STI unit sitting in my garage. STI clutches are f***ing crap.