11 mm or 12 mm in a 1Z pump? Currently my car is decommisioned for a clutch job (VR), I'm running a RC2 and 205's. Looking for a little more. I've heard/read that 11 or 12 mm pumps will cause or potentially cause shuddering in 1Z or AHU engines. Can anyone verify this for me, firsthand ?
Cheers.
Rob