get the GM performance build book. it has step by step to get you to an easy 300 whp. they make cams, header, magnaflow exhaust, intake, etc.. no chip but you can flash the ecu. also if you check out crateenginedepot.com they have an entire cobalt store. gm parts=warranty. warranty with 320 whp thats not bad.
also i would highly recommend the cobalt to anyone.
1. faster than honda.
2. faster than SRT4
3. holding its groud to a mustang.
4. AMERICAN MADE!!