HELP!!! Most benefits from larger exhaust
 

Hey everyone, I own a 2012 cummins (just turned 12K) I am doing all my deletes tomorrow I have done a 6" cold air intake custom bent, Smarty Jr. programmer and now doing the EGR delete and DPF delete!! My question is-is there any real benefits from switching to a complete 5" exhaust over 4" exhaust? I am not going to do any other mods to my truck just the above deletes... I am going to be deleting the muffler too so it will be straight piped over the axle and exit in the stock location. but really is there a need to go larger diameter? Your help is MAJORLY appriciated!!!

Power, performance, and ,mileage wise? No. %" will give you a different, deeper sound. That's all.

Update: I did the deletes and went with the 4" exhaust with no muffler, It sounds AWESOME my son loves it and I am seeing currently 19.7 mpg originally before the deletes as pulled into the shop I was sitting at 15.9 mpg it is still climbing but I wont know till I run another tank of fuel through it as this is calculated averages. The truck has 12400 miles on it now... I expect fuel mileage to go down a bit once the 35" tall tires are put on but I am very pleased with the truck now... even more happier with it than my 02 and 05 (all the creature comfort stuff):jump::jump::jump:!!! :rocking:

Just make sure you hand calculate fuel mileage and don't go by the Lie-O-Meter. :tu:

My 2012 lie o meter is right on. Exactly. I heard some are way off tho.