Originally Posted by
v6shooter
sirio cl7 sti and the evo4 sti use the same rod [ same part number]it all about the crankshaft stoke. I gained the compression by removing a shim and i will watch it close. Not for beginers. 16.62 evo vs werks b5 16.50 crankshaft
Port timing will be your only achilles, and depending on which way it moves it, it might actually fit your style of driving better..
I have a STi Evo 4 that needed new crank, I have a werks B7 I was considering swapping into, it, but decided against it, becuase none of the modders or manufacturers would give me any idea how well it would work.. one said it coudl either increase bottom end or loose bottom end.. Considering I wanted more, it was a gamble I decided against.. I ended up with a nice used RB S5, and am glad I got it..