Originally Posted by joepants23
I have a 2013 335is coupe. Did a s2 dinan performance upgrade. Just put on the Free Flow Exhaust with black tips. The sound of the cold start up is amazing because its a deep put (similar to the sound of a v8). However driving, barely hear it. I think I got spoiled with the fine tune of the stock exhaust. On the other hand, the car does perform much better.
Any ideas to make it louder?
Catless DP's and if that's not good enough then second resonators delete and maybe increase size of exhaust piping to 2.5 - 2.75.
But I think you'll be happy with catless DP's!