6.7L Cummins Forum

mariocand · #1 (**permalink**) 05-21-2008, 04:14 PM

I just got done putting on the MBRP 5" DPF back pipe with their 6" tip. The install went fairly quick but I did do it by myself and it would have been tons easier with an extra set of hands. Since the install I've noticed an improvment of about 1-2 mpg on the first tank I ran thru it. The only difficult part of the install was getting the tip onto the pipe due to the fact that the end of the pipe had gotten bent a little during shipping so it took a 2x4 and a hammer to get on. And a lot of choice words. The tone of the truck has gotten deeper and when under load you can hear the turbo spool up nicely when using the Jake.

Tater · #2 (**permalink**) 05-21-2008, 09:15 PM

Hey thanks for the info. That's the system that I finally decided on. Gonna get it next week!

GLogan · #3 (**permalink**) 05-21-2008, 11:56 PM

Let us know if this mileage increase is consistent tank to tank. I'll spring for one if it is.

Squid · #4 (**permalink**) 05-22-2008, 02:14 PM

So where did you get it from?

mariocand · #5 (**permalink**) 05-23-2008, 02:41 AM

I got it off of extremediesel.com. It only took them three days to get it up to Alaska.

Squid · #6 (**permalink**) 05-23-2008, 05:09 AM

Cool. I'm starting to get the itch.

mariocand · #7 (**permalink**) 05-30-2008, 01:12 AM

since that install, i got about 1.7 mpg increase over 3 tanks. im very hapy with it but if you go off road be warned, it is a big pipe and it hangs a little lower than stock, id be a little worried about getting into deep mud with it.

GLogan · #8 (**permalink**) 06-02-2008, 10:55 PM

Thanks for the update on your mileage increase. I had seen another post claiming no difference but couldn't see how a truck could breathe through a muffler as small as they use on the 6.7. I think that will be my next mod.