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Old 05-08-2009, 03:28 AM   #18
Gentry78's Avatar
Drives: 97 c1500/92 olds
Join Date: Oct 2008
Location: Texas
Posts: 5,279
Originally Posted by GMtothecore View Post
Very much would you say CAI, LT headers, catback exhaust.....all with a tune....affect fuel economy?
if you keep you foot out of it and stop listening to how great it sounds lol and just drive normally they will help a lil, probably around 2-4 mpg's
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