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Discussion Starter · #1 ·
I still have a LMM, but I have a friend with a 2015 LML. He is having DEF issues with his truck. He’s going to delete the DPF and run Motorops efi live tunes. Is leaving the cat on the truck ok? Or does it have to come off with the DPF?
 

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Personal preference. When I do them they come off
 
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