I have done around 10000 since i had it done, probably closer to 15000 and also changed the non res to resonated. Dont know if this would have an effect. shortly after i did this is when the problems started
All said and done though had a 20 mile tear up with a M3 today on the M1. when i was in front he would walk up behind me but when i let him past and tucked in behind him he could not go anywhere ( thats with a small exhaust blow and the mapping problems) there was absolutely nothing in it at all. when i moved over i expected him to walk away. No chance, tucked in behind the rear bumper and thats were i stayed well into the east side of the speedo.
