check this out
basically a muffler delete but keeping the quad setup...
Edit: Dont know if the hartage quad and the iCarbon have the same positioning for the pipes. Might have to do some research on that...
Current: 2010 AW/BLK 135i Mods: G5 ISO, Wedge Backend, DCI, BMS DPs, VRSF CP, TIAL BOV, Big Tom, Meth, Fuel-It Stage 2, BMW PE
Best so far 12.5 @ 19.46 spinning all the way down
VM 6465 waiting to be installed. Relationship status is changing soon