I was just curious to know wether or not a duramax exhaust will work on a sierra 2500hd with an 8.1? I know it will need at least some modification just wondering if it even comes close. The reason I ask is there is no aftermarket exhaust that shows much improvement for the 8.1 Everything is only 3". The truck already has that all the way to the muffler then its 2 2/14" or 23/4" duals coming off of the muffler so a 3" wont really help much.

 

Sure will! There was a guy on here that had one on his 8.1l truck.

 

For the most part, the stock exhaust on the 2500s flows pretty decent. Thats why you're not seeing huge improvements with an aftermarket system. I'd just get a new muffler(s) to replace the stock one and run the tailpipes how you want them.

 

would you happen to recall who or any other info????

 

very true, I just really didnt want to take it to a shop be dissapointed with it as many other guys in my firehouse have done the same. It seems no one around here can do a quality exhaust. And I also didnt want to pay a lot of cash for soemthing that wasnt going to help

 

He went by 8100hammer.

 

thanks

 

your pm replied too.

just for the record it was no Dmax exhaust.
It was:
factory pipes brought together into a 4-inch pipe, into 4" single in-out flowmaster race muffler, then used a part of a local shops 4" diesel kit to finish it off(over the axle), then added a 5" diesel tip.

CT

 

thanks for the info!!