Originally Posted by CUMMINS_KILLA99
bout how many dregrees you think 100 or so
It probably varies by brand. I'm not really sure on #'s, but any drop in EGTs is great. I put my Banks exhaust on the same time I had put my pyrometer gauge in, so I didn't have anything to compare with. I'm about a week away from ditching the Monster muffler & straight piping it. I'm going to monitor whether or not it makes a difference. Let's wait & see if someone has some better insight as far as how much you can get your EGT to drop with an aftermarket exhaust.