I've installed a few Diamond Eye exhausts on various trucks (obs, my 6.4, 6.0, 5.9, duramax), and honestly the fitment on every single one was a pain. the OBS i'd say was the worst imo. Preferably, Flo-Pro is my choice.
Thanks for the replys ill have to go with flo pro.. Do you all know what is the difference between the 4" and 5" is there any performance difference or just sound
Just ordered last week from Mike. I got a flo pro dual 4" SS no muffler coming. From what I've researched its the best bang for your buck. Also if u go straight pipe they will all pretty much sound the same. The 5" will be slightly deeper but brand to brand with no muffler will all be very similar sounding.
While it's not a direct comparison, the diamond eye on my '06 Cummins was terrible. Now the flo-pro on my '15 psd was excellent. I will go flo-pro on everything I have as long as they offer it!
I have 5" Flo Pro and fit is good, like the sound of 5" too. I have Diamond Eye on my son's Nissan Titan, 3.5" dual exhaust and it went on pretty good considering the factory only made room for single exhaust and 2" pipe. Sound is very unique and very good. Don't know about their diesel stuff though.