I have an 07 Pontiac GP/GT, and it's completely
stock. I intend to put a lot of time and hard work
under the hood of this car. Where should we start?
Frequent some GP forums and see what other drivers are doing and would suggest.
Check out ZZ Performance . They have lots of upgrade packages for your car.
Theres a lot of pro's & con's about bolt-on performance like cold air kits, exhaust systems, & MSD ignitions. But the most bang for your buck is a high perf cam & kit. And buy another cylinder head(s) & have it modified with a port & polish job, & bigger valve springs that come with the cam kit. Then when you're ready, install the modified head(s). Seek out a good cylinder head shop for qualitly & prices. Some people use Dart or Eldelbrick heads, but much more expensive.
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