Thats becuase you will find the T5 with a 3.35 first gear, or 2.95 with the z spec tranny. If you have an 8" rear, you could run 3.55 rear gear for best road manners and economy. With the 3.35 first, it seems 3.80s would be better for the strip, and 4.11 for 2.95 first gear trans. If its a...