I was wondering if there was still a page seeling cavaliers aftermarket performance parts like cobalt have ZZPerfomance.
Turbo Tech Racing I believe is still around.DRIVING FORCE FABRICATIONS
What all are you looking for?
general overall performance parts will mostly try to turbo charge in the future.
I know fastwayracer has tubro kits for t Cavaliers.
Look up the NWF swap and the IRS swap for some brakes/suspension upgrades. I'm doing both in one of my 2003 Sunfires.