Downpipe Question

[KingStroker]

I've only had my truck about a month now and I'm wanting to do a cat delete. The truck has MBRP 4" exhaust run from the cat back, but I have a suspicion that it also has the MBRP downpipe. If that were true I'd just need a cat delete pipe from MBRP...anyone know how I can if the downpipe is factory or the MBRP one?

Also, if I find it's not, anyone know a cat delete pipe that will bolt up to the stock downpipe?

[smuesse]

The factory down pipe is 3.25" if that helps.

[KingStroker]

Ok thanks I'll check into that...I've heard everywhere from 3 to 3.5 on the factory downpipe

[smuesse]

Same here, well not the 3" but 3.25 and 3.5. Mine is stock and you can tell that the downpipe is a little smaller than the rest of it. It starts with 3.5 where the DP bolts to where the cat used to be. I had my cat and muff removed Monday so I looked at it then because I am considering buying a 3.5 downpipe to match the rest of the exhaust.