Hey, I just ordered a kit from this place that is only about an hour from where I live. They specialize in Grand Prix GTP's mainly, but they have something for the Redline/Cobalt SS... Its only $525 and they put it on a Cobalt SS and it put down 270 on the dyno with nothing but their kit. It includes 42.5lb injectors, Casper's wiring harness for the injectors, new spark plugs, MAF Translator, and 2.8" pulley for the s/c. On their site (
www.intense-racing.com ) it has in the LSJ/performance package/stage 3 the dyno sheets. It was exactly 270hp/236lb!!!!! It had 14psi at 3200rpm and by the time it was done it was at 17psi.
Also, to pick up the slack from the belt, they have a simple solution...a larger idler pulley. It is only 2.5" stock so they have one for $20 that is 3.0" since its a drop of .5" in the s/c pulley. I will hopefully get mine soon and have it on the following weekend! Oh and the truly best part is that its all plug and play...they said that it can be done in about 2 hours. I'm going to take mine to the track later this month and test it against some built SRT-4's