I dont know what u guys are talking about regarding modding an auto...I have a cat back, filter and pulley and premium fuel (a must) and i can definately feel the power after 3k...so much so that i can put it to most people on the road.....save the porsches, corvettes and other sporters. I have owned many powerful vehicles...Benz 450slc, Alfa 164l, Buick 3.3l (all autos) and although the modded pro5 isnt blistering it can take most people off the line....after that well...............that depends on if its a SI or a WRX