Cat Back Exhaust Pipe Diameter

By Griffin86
June 7, 2008 in Gen III & Gen IV V8 Engines (LS-Based)

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Griffin86

Posted June 7, 2008

Hey do you guys know the diameter of the pipe for the duals for like gmpp, corsa or magnaflow cat backs? I was thinking about getting custom exhaust for my truck. 2.5'' should be good. I was thinking about having a system that is on the quiet side with exhaust cut outs. Has anyone done that to a NBS truck?

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