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Old 07-09-2013, 10:07 AM   #2
blazzin1


 
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Drives: 2010 2SS/RS R6P
Join Date: Nov 2008
Location: St. Cloud, FL
Posts: 4,845
If you have Kooks Headers (as stated in your signature), then you need to get your HF Cats from Kooks. There are several different collector flange styles depending on the manufacturer. Kooks will have CATS with the same flange style as your headers. They have the "Green" Cats too, that supposedly don't require a tune. The other end of the cats doesn't really matter too much. 95% of all cat-backs for the Camaro are all the standard 2-1/2" exhaust clamp connection (just like stock). So more than likely, the CATS will be a 3" in and 2-1/2" out.
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