Clifford the big red dog Posted September 6, 2021 Share Posted September 6, 2021 I have a 2013 mack pinnacle mp8 sleeper truck, and was wondering if I could delete the large oversized muffler and replace with straight pipe without it messing with the dpf or anything else? Quote Link to comment https://www.bigmacktrucks.com/topic/68002-muffler-delete/ Share on other sites More sharing options...
mrsmackpaul Posted September 6, 2021 Share Posted September 6, 2021 Give it a try I guess, I have no idea Paul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/68002-muffler-delete/#findComment-479503 Share on other sites More sharing options...
Mackpro Posted September 7, 2021 Share Posted September 7, 2021 The big muffler box is the SCR box, it’s where it the DEF fluid and exhaust and mixed and lowers the NOX levels. The outlet NOX sensor sniffs the exhaust as it comes out of the SCR box , if the NOX is to high you get the 5MPH derate . So in other words, it has to on there unless you get a delete done. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/68002-muffler-delete/#findComment-479529 Share on other sites More sharing options...
Mean Green Posted September 13, 2021 Share Posted September 13, 2021 don't touch it like mack pro said it houses all those components it's where the magic happens we have a truck shop where I work and we have trucks lined up outside getting there dpf deletes reversed. got caught by the epa and now they have to put everything back on 1 Quote If your going to be a bear be a grizzly Link to comment https://www.bigmacktrucks.com/topic/68002-muffler-delete/#findComment-479846 Share on other sites More sharing options...
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