Originally Posted by 328inGE
might help if you could identify whether they are cat-back or axel-back, the pricing and link the sound clips for comparison. the majority have picked the m-performance exhaust which is an axle back, so there will be no performance gains from that system.
Are there an axle-back exhausts for the F30? Would require cutting the OE exhaust so I'm not sure many will be offered. I could be wrong though!