Quote:
Originally Posted by ts1412
I know someone in my neighborhood had test pipes with no muffler and it was stupid loud, and I want to be sure what sound I can expect. The short tails are good but figured I'd go with HFC's for the small HP gain and (potentially?) deeper noise.
Thanks all
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The decibel difference between most HFC's and test-pipes is negligible. Your car will sound similar to theirs but you'll have less of a smell, at least.
Aside from the Cats, the most restrictive piece on the stock exhaust is the Y-pipe.
I'm with nick654 on this. Replace your mid-pipes. It will sound a bit deeper but won't make it stupid loud, as well as being a lot easier to install. If you find resonated mid-pipes that will free up a few ponies while also easing some of the rasp.
AAM has already been mentioned, but I'd look into Garageline's X-pipe/Midpipe combo. It's reasonably priced and resonated. I called them in January looking for them and they were sold out, but the owner said they'd have more in stock by March.
GarageLine Nissan VQ37 X - Pipe and Midpipe Combo - Welcome to GarageLine - Sport Compact Performance Parts
Hope that helps!