I really want a splitter mainly due to it looking cool imo... (at least some of the splitters).. but really doubt I will see much benefit except for maybe creating a higher pressure difference in front of the radiator and trans cooler...if I assure enough exit path then it should help in cooling a bit I figure. but in the end I dont think it will make much difference.. but will test back to back with and without on the track and see how, if any it effects it.