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255 Posts
I have ISR ldps and when i added them to my borla i got the rasp and trumpet but resinators did mitigate that.The angle that the rev 9 bolts to the OEM muffler with seems like the problem to me. I messed with the muffler hangers and got it pretty much where it needs to be. I have isr downpipes with high flow cats and I think without the reasonators I would be getting rasp. It's an easy fix if you want to install reasonators at a later time.