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      07-24-2008, 01:26 AM   #6
Second Lieutenant

Drives: F80, XF Super V8
Join Date: May 2008
Location: Rocky Mountain

iTrader: (7)

Originally Posted by HP Autowerks View Post
Check the clearance between the cross-over section of the exhaust and the chassis brace. Most shops will secure the exhaust as is sits may cause the cross-over pipe to come in slight contact with the chassis brace. Pre-load the system with a spin jack, then secure all the clamps, that usually does the trick.

How many miles did you put on the exhaust? There is a break-in period for the Borla system.

I'll go back to the muffler shop and have them check that out again tomorrow night. I bought the exhaust used and it shows sign of wear so I assume the Borla should be past break-in already.

I had a friend ride along with me who examined the rear cabin while I accelerated in the troublesome 1500-2000rpm range and confirmed the vibration wasn't coming from a loose trin piece (before with the stock exhaust the vibration definitely wasn't there.).