[QUOTE=Nightmare;110024]A little bit of thread revival here.

I have 3:73s and it revs around 2100rpm at 100km/h. I wouldn't want to go any higher than that.

I was looking into a chip/tuner to. I have CAI, bigger throttle body and exhaust. I'm looking into getting pulleys and a cam and would like to get it all running at max performance.

I was looking at the SCT tuners at americanmuscle.com ... Are those from Steeda? I'm not sure. Does anyone have any experience with these?[/QUOTE]

The SCT tuners from American Muscle are the same as the SCT tuners you buy anywhere else with one difference.....the tune.
I have yet to hear anyone who raved about how great the tune from American Muscle was when they bought a tuner from them.

They are a good company to deal with overall but I think whoever does their tunes is still learning the finer points of the 4.6 (in my opinion).