grogan

first mod I did to my car was 4.10s, ordered them right from American muscle. if you get them you will need a tuner to get the speedo working correctly. I use jpc to tune my 03 but I run the bama tune on my 08 and it works like a charm. nice thing about the bama tune is they give you 3 tunes, so if you decide to hit the track one day, you can change the tune right there in the parking lot, not having to call anyone, etc.

if you do the headers route, it will get a lil bit noisier in the cabin with the vert.