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Old 03-07-2012, 10:30 AM   #51 (permalink)
hackish
Calibration Engineer
 
Join Date: Jan 2010
Location: Canada
Posts: 86

Subie - '00 Subaru Impreza STi JDM
90 day: 22.49 mpg (US)
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Quote:
Originally Posted by 2005_rs View Post
My magnaflow installation looks alot like your pic in the o.p. The noise was horrible until I added a 9" tailpipe section onto the muffler in order to terminate the exhaust at the bumper. That quieted it down a lot. I think the sound was resonating off the inside of the bumper and underneath the car until I made the change.
One other thing to add with this sort is that a straight-through resonator will make a huge difference in lowering sound. Even the skinny bottle style resonators go a long way and they're relatively easy to fit on many vehicles. I used to install a lot of these on kids' cars when they got too many noise tickets.

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