ill keep it short and sweet I am wanting to replace the stock throttle body and would like to know people opinion which is the better choice. in my previous experience I have found that going with the 70mm on the street I would loose down low throttle response but would come on harder in the top end. where the 65mm didn't loose that down low. this car is a street car 99.9% of the time so I wanted to pick everyones brain and see there combos and which they went with and why. car is not stock has turbo upgrade, exhaust, downpipe etc, injectors chip, stock stall and stock internals.