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Old 08-17-2017, 06:42 PM   #1
Drives: 2013 2lt
Join Date: May 2014
Location: Indiana
Posts: 42
Adding cats

I have BBK headers with off road midpipe. I want to put some highflo cats on. Anyone put aftermarket cats on? I have 3" collectors and the standard 2 1/2" exhaust. I figured I'd need flanges and have muffler make them. 3" or 2 1/2" cats?
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Old 08-17-2017, 08:01 PM   #2
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Drives: 2010 2SS/RS LS3
Join Date: Mar 2013
Location: San Antonio, TX
Posts: 587
Texas Speed makes slip on Cats that are 3" at the headers and 2.5" at the exhaust side. I run these but I also have Texas Speed headers. They may fit. I would give them a call.
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