Have a 13 gt auto with 373s, question is i am doing a 575hp. Roush kit in a couple days,do u think this is a long lasting performance mod,want to keep my car 15 to 20 yrs maybe 100k to 200k. Whatcha think.i am a pretty sensible person.just want the power cause i can.what say u.will be mostly street driven in the summer.i live in wisconsin