So the exhaust finally came in... got the injen intake, isr cat back exhaust.. what next? Isr test pipe or pierce downpipe?
So this is what I should go with and planned on, it’ll be 3” since exhaust is 3” all the wayGut the OEM downpipe carefully on the cheap or buy a full 3" DP if possible for the most gains. A full 2.5" downpipe would be a good second choice. Pierce and SXTH element engineering are both good options. Keep in mind if you plan to replace you need a full downpipe and not just the lower downpipe of the 13-15 design.