Well after a year having parts build up in my den and my wife's compliants I finally decided to take my 2003 Redfire Gt in to have these parts put on. Put on were steeda underdrive pullies, timing adjuster, steeda short throw shifter, drop in K&N filter, and a recently bought Mac Prochamber. OMG, this car sounds like a true muscle car (I have ravin mufflers). The shifter took a little getting used to but man it's nice. I was chirpping gears all the way home and wasn't even trying to. At 3,000 rpm's it pulls nicely. Well this will be fun for now and but very shortly I'll start pack ratting parts away in my den until next year.