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07 Classic 2500HD Exhaust


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Here is a problem that I have run into. I have a 2007 GMC 2500HD Extended Cab "Classic" body style. I want to put on a Magnaflow #12909 muffler. I want to keep my factory pipes. The problem is the muffler is 3.5" single in and out and the pipes on the truck are also 3.5" The muffler shops can only fabracate up to 3'' pipe. Has anyone ever installed just a muffler on these trucks using the stock 3.5" pipes?

 

Thanks!!

 

Dennis

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  • 2 weeks later...

Ok this is want I had done. I had my local muffler shop bend a 3'' piece of tubing that he welded between the muffler inlet (new magnaflow) and exhaust pipe outlet. He could stretch the ends of the 3'' tubing to fit on the inside of the 3.5'' exhaust pipe and new muffler inlet. The question that I have will going from 3.5'' (exhaust pipe)to a bent 3'' tube back into a 3.5'' muffler hurt the exhaust flow? I wish I could upload a pick of the 3'' tube but I can't figue it out??

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