dB SPORT 3.0 Dual Rear Exit Cat-Back Exhaust w/ Single 4.0 Polished Tips (2007-2008 Silverado & Sierra 1500 4.8L, 5.3L & 6.0L) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS