Quote Originally Posted by seXterra06
if you're going boost, i would go with an LS tranny. or something w/ long gears so you can hold each gear longer and get the full use of boost in every gear. you can always put an LSD in an LS tranny
No. The shorter geared tranny is going to accelerate faster. Run the B16a tranny if your mph lets you. Otherwise, get GSR 4th or GSR 3rd and 4th gears if need be for mph.

To OP, ITR and B16a gear ratios are the same for USDM.