It is a 5inch

@@canamatvs3850 Thanks. I’ve got a later model 2015 and just got in my def and egr delete. I’ve got the ez link tuner for it. Gonna be installing it soon. I got the 4 in exhaust. How’s your truck run with the delete on it?

@@R-8.0 niceee man yeah I love. Wish I did it a lot sooner. May be pricey but was 100% worth it. The trucks runs great. I have a airdog 165 lift pump on it too so if you didn’t get one of them I do recommend it just to be safe because these trucks takes lots of fuel and it’s also safe with the cp4.

@@canamatvs3850 Thanks for mentioning that. I’m looking up the lift pump now. Where did you get yours from? I’ve been alittle worried about going to much on the tune without having the the cp3 conversion. From what I read the cp3 conversion seems to be a must with these LML’s. Also what kind of tune are you running as far has hp gains?

@@R-8.0 okay yeah so I got my lift pump off of a good buddy of mine’s company which is underdogdiesel so I’d get it from there. Yeah I mean the cp3 are kind of a hit or miss you won’t really have problems with it if you have a lift pump and also if your using good diesel (fuel) I wouldn’t use the quote on quote performance diesel or whatever they may call it so that will play a factor in it. Also for my tunes I’m running the efi live autocal v3 with dsp5 switch so my tunes are I believe 30,60,90,120, and I know the max or race tune is 150