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Discussion Starter · #1 ·
Iam brand new to the duramax mods and this forum, came from a Cummins. Ive been driving company duramaxes now for the past 4yrs and i finally got laid off from work and i bought myself one, I have a 09 dmax now LMM and have the muffler delete so far. what i wanna know is if i delete the Cat can i leave the DPF? I know everyones gonna tell me to delete it but im not in the market for a tunner right now. But i know if the cat was gone it would breathe alot better.
Doing this will it throw any codes?
 

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Deleting the cat alone will net you basically zero gain, they aren't as restrictive as you'd think. A cat/dpf delete and tunes can be set up relatively cheap. Personally I would say rip that dpf off asap cause of the stupid style of over fueling they use to burn off particulates.
 

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