i have a 2004.5 lly. i have six inch stack but with a stock downpipe and cat. i ordered a 4 inch down pipe and was wondering if it will throw codes? any help? thanks
i have a 2004.5 lly. i have six inch stack but with a stock downpipe and cat. i ordered a 4 inch down pipe and was wondering if it will throw codes? any help? thanks
No it wont, well at least mine didnt...
2004.5 LLY Duramax, Compounds, EFILive, EvolvedMS.com 50" Trac Bars, DDP Injectors, PPE Pump, 4" turbo back exhaust, 6" Chrome Stack,
ATS Trans w/ Triple Loc.
Evolved M.S, LLC & SS Diesel Tuning
ok thanks nemo, i have heard that the llys dont need them but at the same time i have heard that they do so ill just give it a try. thanks