99 sierra exhausr
October 3rd, 2012, 7:20 PM
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99 sierra exhausr
Hi i have a 99 gmc sierra 3/4 ton w/ 6.0 vortec. the exhaust runs side by side into the muffler. Should i put a Y on it and replace the muffler with pipe or a glasspack after the Y. Either way itl be 2 into 1 but just want the better sound.
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