Well, if you've got it, try and put it on. As long as it seems like everything fits and if there is no binding your probably good to go. I can't imagine the T4 vs T3 sway bars could be much different. The T3 one is shaped the same as the T3 one probably, like this \_/? Then there are 2 2-56 screws with washers, and 2 1-1.5" 4-40 threaded rods with ball ends for both, thats what the T4 kit has so you can compare I guess. I figure you should just try and mount the kit you've got on your T4 and see what happens, you can't return it anyways so whats the difference.