according to Trailer Life magazine the 8.1 out performs the duramax loaded or unloaded. that seems to be a different story than G.M is telling. i would like to see them run each other stock, and see for my self. dave p
according to Trailer Life magazine the 8.1 out performs the duramax loaded or unloaded. that seems to be a different story than G.M is telling. i would like to see them run each other stock, and see for my self. dave p
2001 2500 hd. long box, club cab, LT. trim 373 rear end 8.1 gas engine 4x4, allison transmission