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Old 02-18-2013, 04:44 PM   #5
TripleBlkZL1
 
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Drives: 18 ZL1 A10 & 18 2500HD Duramax
Join Date: Oct 2012
Location: Chicago, IL
Posts: 733
Headers will definitely require a tune, and you don't need a new catback system. Longtube headers, cats or no cats, and stock exhaust and your car will sound beast. if you would like to hear my set-up, let me know and I'll post up the video.
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