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Exhaust question

cat back or muffler
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Exhaust question

Postby Ambully! [OP] » May 17 2012, 4:18pm

Hey yall

Went to get a cat back system yesterday and the shop said it would be a waste of money to buy the cat back because 2011 silverados/sierras already come with a 3" inch pipe. He said just a 1 in dual out would give me the same results.

Any truth to this?

Thanks
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Re: Exhaust question

Postby ASTE25 » May 17 2012, 9:31pm

Sounds like he is right to me (assuming it has a 3" pipe to the muffler).
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Re: Exhaust question

Postby tcarr25tcarr25 is online! » May 17 2012, 9:52pm

I just did a si/do muffler on mine. The muffler was 3 inch in so I assume they run 3 inch pipe from the factory. I would save some money on buying the system and y a muffler and pipe at the shop and let them do it like you want it done. With a catback system you don't have a whole lot of options on location of pipe exit.
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