Thread: ARH Headers & MTI Cam using stock mufflers (LS3) - Help!
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Old 09-15-2010, 03:39 PM   #12
2010 2-Tone


 
Drives: 2010 RY 2SS with Custom Stripes
Join Date: Mar 2009
Location: Jennings, La.
Posts: 2,220
with those LT's does the cats help in keeping it from being louder or are they just for emissions?
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