Have you noticed any performance gain over just the Flowmaster 40?
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'07 - Cool - Ebony Leather - All Options
(except On-Star and Auto)
Permagrin began August 4, 2006!
Rear End Leak started - 10/17/06 - 4,200 miles;
New Diff Installed 10/27/06 - 5,000 miles
Rear Seal Recall 2/15/08 - 24,000 miles
SOLD 3/27/08 - 26,500
Mods: Fujita CAI; Splash Guards; Kappashield; Magnaflow muffler; <more to come!!!>