if you tow heavy loads the tt2600 if you dont tow over 3000 pounds the tt3000 will improve your truck to get off the line and in its power band . the tt3000 is what i am gunna get in a few weeks when the tax check comes ..

 

You will tell a difference either way u go, i defenantly did when i went from 373 to 411, but im going back to a taller gear now due to turbo build

 

ya im just trying to figure out my optians im using the truck as a DD and do tow alittle and also see's highway driving so just see'n what would be best