Had mine on for about a year, after about 10 months not loud enough. I removed the muffler and now the neighbors really love me. The noise in the cab is tollerable at best.
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2000 2500 QUAD CAB SLT 4X4 5spd 3:55'S Auto Meter Gauges, Magnaflow exhaust, EDGE comp (wire tapped), traction bars, Nitto 305/70/16's