bolt on HP
The stuff isn't cheap but without opening your engine and doing major work you can boost your HP immensely, get a Summit catalog and look at all the stuff they have for your car.. The K&N filter was a good investment and lining up and after market exhaust system will help. Then you might look into a performance chip. or tunable setup. I would suggest staying away from the Nitrous, save your engine Dude! This stiff isn't really for street use anyway but some people sneak it in.
Rat Rods Rule!