Quote:
Originally Posted by mr_squirrel
Checked it out with my dad who is an engineer with TMS, and he couldn't figure it out either. He thinks the exhaust is hitting something like the driveshaft or rear diff (he kinda distrusts aftermarket stuff).
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This is worth looking at. Like the previous poster mentioned, try to get the car into a similar position as when you get noise and then grab the exhaust and move it.
And yes, this is VERY common with aftermarket exhaust systems. From my Miatas to M3s *EVERY* exhaust I've installed involved some sort of repositioning to keep it from hitting the diff carrier, drive axle, rear body outlet, etc.