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.