After new 275 40 17's I did worse on my 60's and worse on my trap speed and it was about the same on all 6 runs.......I have not measured but I'm sure these E/Ts are taller than the BFG's. Kind of at a decision making point....not sure I want to go 4:10's because a PA is in the future.......but then again I know others running auto's with PA's and 4:10's..........oh well, at least I had fun at the track......it was cold, I think everyone had trouble hooking up....