Quote:
Originally Posted by PeterA90
Don't get the midpipe if your catless. I repeat don't get the midpipe if your catless. I got it on my car and shit was so loud and droning. Hated it. Currently installed a vibrant ultraquiet resonator in my midpipe and removed the rifling noise and drone. I also have a small vibrant resonator after the downpipe to remove the annoying hollow sound. My car now sounds like a proper sports sedan. And, the exhaust sounds expensive. Before it sound cheap.
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there seems to be a common misconception here regarding secondary cats.
secondary cats make absolutely no difference with drone, its the resonator which causes the awful noise. this is why I think its best to have your secondaries replaces with straight pipe at a muffler shop (cheap, like $150)
not only do get the added sound and performance of a secondary cat delete, but you get to keep your factory resonator as well..
only N52's, e9x (M or non M) and the f80 m3 have secondary cats. so for your f30 335/340 guys, its best to keep stock res like you said.