Quote:
Originally Posted by Deep071
HI everyone I'm somewhat new to this forum and haven't really posted yet and just had a quick question to everyone.
i have a 2009 nissan 370z with stock exhaust except z1 motorsports test pipes that were installed recently. I'm in the market for a new exhaust and needing some opinions on what you guys think would sound good?
also for got to add that currently my test pipes are making a bad rattle sound and I've looked under the car when it was on a lift and even had a performance shop here check it out and they said it was fine but still continues the issue anyone know what this is??
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It's a resonance characteristic of the motor -- probably sounds real bad on coast down around 2K RPM...
Are the TP's resonated? If not, I'd swap in a set for less rasp.
Other than that, you will hear some rasp with any set-up -- it might be a bit less if you switch from a Y to a H-pipe as the H equalizes the pressure waves coming from each bank and helps neutralize the harsh resonance.