Posted by mannyc [96.224.210.179] on Tuesday, June 03, 2014 at 08:41:21 :
guys. my exhaust on my 2010 cummins is rusting out behind the DPF. want to go stainless. looking at the magnaflow stainless products. they have 4" and 5" exhausts. with and without mufflers. any benefit to a 5" exhaust if the pipe coming out of the DPF is 4". I asked at the TDR, but those guys have a bigger is better mentality about anything you ask them. I am looking to eliminate rusting going forward. not looking to trip any codes. any thoughts???
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