Ive been wanting to upgrade on turbo im either gonna go with a B1-04 or a B1-2 04 . I have a 04. 5 truck with the six speed transmission and 4:10 gears im running the tst box an afe intake and a 4 inch exhaust. I dont really tow other than a couple snowmobiles . My truck is mostly a ride around truck and i like to drag race in the summer. I am eventually goin to buy a clutch and a fass fuel system in the future. I wasnt sure how hot the B1-2 turbo runs on higher settings of the tst box and if i have enough hp for the B1 turbo any info would help thanks Adam