I highly doubt that you will see a 4-5 tenths quicker in the 1/4 mile. I had 3:23 in my Formula, and put in 3:73. I did not see ANY increase, due to the fact that I now had to feather it more off the line, and this is with Goodyear GS-C radials. If you go with a Drag Radial, you might pick up 2-3 tenths, but that would depend on your launch. The 3:23 rear seemed to pull just as hard, and it was a LOT easier to pull away from a light(in town), without having to worry about wheel spin.