You should have zero problems up to about 400 hp maybe much more. I know I was speaking with my BMW service guys about car today, mine has the BMW Proformance pack on it, they said the pack has more of a punch for autos than manual and this was because the auto can handle more which I thought was backwards generally speaking. They explained the clutch is sufficient for the stock setup and then some more but the auto is more than sufficient for stock and much more. This is totally backwards for most cars but for the 135 it is not,,,the stock power kit boost trq to 332 auto and 317 manual
Last edited by 2totalled2months; 12-12-2012 at 10:16 PM.
Reason: more info