how loud r the gmpp mufllers? u would think since they r gm made they would be quiet but better flowing
how loud r the gmpp mufllers? u would think since they r gm made they would be quiet but better flowing
2002 Chevy Silverado LT 5.3L z71 ECSB, Fully Built DMC 4L65e, Transgo 4L65E .500 Boost Valve, Transgo Shift Kit, Billet 1st Gear Servo, 2nd Gear Sonax Super Hold Servo, 4th Gear Billet Servo, Rebuilt 10 Bolt w/ OEM G80 and 3:73's, Dumped Single 3" Spintech Muffler, 3" E-Cut Out
Posting Permissions
Reply With Quote