I installed lower downpipes with just the Tanabe axle back and it was too raspy and loud. Loud enough on cold start to tick off my neighbors. I had to put the OEM muffler back on. My question is has anyone ran lower dp's with an aftermarket y, resonated mids and oem muffler? Would the muffler bottle neck negate opening up all the other piping? Wasn't sure how restrictive it was since it has such a large chamber. Any ideas?