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we build those exhaust and test with the engineers from GM. they no way affect sound or performance in that current situation. By adding more boost/power you will not see any additional gains either by modifying. I cannot speak on behalf of other exhaust on what they do.
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Ordered: 1/15/2016
2000 status 02/01/16
3000 status 02/29/16
3400 status 03/07/16 TPW of 03/14/16
4200 status 03/17/16 in transit!
Delivered 03/23/16
2SS Hyper Blue | 6M | NPP | Mag ride | ceramic white Int. | Black out bow ties | P3 Gauge| Front splitter. | 6 pot upgraded brembo brakes. | Magnuson Supercharger/95MM pulley | Rotofab Intake | ZL1 side skirts | HRE FF04 wheels - Michelin PSS4 | ZL1 add ons rock guards and lift points. | AWE touring - resinated catback with link pipes.
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