Originally Posted by
schoellnasty
if you use the 5 speed clutch and flywheel you need the 5 speed fork. if you use the 6 speed clutch and flywheel you need the 6 speed fork. i've seen it done and tested. i've also searched many on the subject. the only difference is you can not take a 6 speed clutch and flywheel and put it in a 5speed.
these quotes are taken from this thread that shoell posted:
No, that is false information!
The clutch and flywheel from a 2.0L WRX motor, that was originally equipped with a 5 speed, will work work beautifully with a 6 speed tranmission.
There have been a few people who have sucessfully installed an STi clutch and flywheel in a 5 speed transmission, but I believe they had to machine down a few small areas inside the bellhousing to fit the thicker flywheel. I dunno, I've never seen this first hand.
Regardless, the 2.0L / 5 speed clutch and flywheel work PERFECTLY with the 6 speed transmission
ya, what he said. i'm currently running an exedy stg 1 organic clutch and an act lightweight flywheel for '03 wrx with my 6MT. a wrx clutch and flywheel will fit, but if you beat on it ya can expect premature wear.
The diamter of the WRX clutch is 230mm and the one from the STI clutch is 240mm.
So you canīt fit a STI clutch into a WRX gearbox, because there is not enough place!
But you can use the WRX clutch in an STI geabox.
I wouldnīt do this if I had the choice, as the bigger the better in this case, so the whole power can be transformed well over to the wheels!
i'm pretty sure that covers it but yes if you use the 5 speed clutch and flywheel you need the 5 speed fork. if you use the 6 speed clutch and flywheel you need the 6 speed fork.