GO Try it you will have your own...by no means will a car with 600rwhp run faster then one with 900 so dont take it that way.But losing 10-20 hp and 15-25 ftlbs of tq helps some rwd cars....the biggest part of FR cars is getting a good launch.most 9 second rwd cars have plenty of top end.WHen you run them with the same exact setup you will see 0-60 go down numerically from say 2.555 to 2.540 or so which is a decent amount..0-100 will go up for example from 3.899 to 3.910 or something like that but if you raise the gears either by final drive or re flipping slightly you can get the 0-100 back to where it was and sometimes lower and keep the 0-60 faster.Im sure we have all tried to take a little hp off of cars with lots of wheel spin by downgrading exhaust,intake,or adding a little ballast but all of that affects the weight of car negatively at the rpm at which it makes peak hp/tq which hurts ets and everything....having slightly less hp from the exact same weight,rpm and everything does not do any of that.All it does in game is almost add a real life version of srf but to a lesser extent...BTW g's will go up a little