Borla 09-12 GMC Sierra 1500 / 09-12 Chevrolet Silverado 1500 SS Catback ExhaustBorla 09 12 GMC Sierra 1500 09 12 Chevrolet Silverado 1500 SS Catback Exhaust The BORLAA*A? sound of power. Its been described as asonic shot of adrenaline. An intoxicating concert ofsteel, gears and combustion that echoes from thespeedways, deserts and highways of the world. The sound of more victory laps than any otherbrand, the BORLAA*A? exhaust note has become the quintessentioal soundtrack of high performance motoring. And like all good