When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
a good buddy just got a 07 duramax lmz old body style he is hoping for some more fuel economy what do you guys think about 4'mbrp exquast diablo predator programmer and the air box mod.good start or is there a beterr route to go. any input would be great thanks.
just go straight to efi or ppe. i kick myself in the head every time i think about it now, and i just put a 4 inch turbo back with 6 inch stacks on today from mbrp, and they are sick.......