well i really dont care either is fine with me. i hear alot about cams,cam gears, pistons,throttle bodies and all that stuff. but also i hear about nos and turbo. i was looking to do maybe a little of both like the pistons and cams, with a turbo kit(on gsr engine). and about the money well it would be an step by step thing i wouldnt do everything at once. i would get each part graduately