imnot sure on that but i do know that aftermarket exhaust sounds amazing on these trucks. You should really look into a chip too they might be able to help with the egts im not sure but they might have a setting or something for that. Either way a chip makes these duramaxes extremely powerful. Im thinkin bout getting a red or black 2500HD duramax in the next few years. Anyway congrats on the purchase man got any pics?
Got it at a [email protected] dealership . Bone stock for now... it's got so much power, I don't think I need a chip . We're going to haul 4 yards of mulch this weekend, so it's a trial-by-fire for this beast.
I got a 5" straight pipe on mine and on my high tune my egts (while racing) got to 1400 not bad for a quick burst but if I was towing and was at 1400 up a hill not good on stock they stay around 400-800
my buddy and i put a 4 inch straight pipe on his 06 cummins, turbo back. it lowered his EGTs. keep the cat though, some states are really anal about straight piped diesels, just in case you get flagged at the inspection station
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