i want to buy nitrous for my car the only thing that i got on it is aem cai p&p tb, what else would i have to buy and what kind of system should i buy. and is it realy worth it. is it bad for my engine

You dont need anything else. I have just about the same mods. as you and have been runing my car with a 75 shot for about 1.5 years without any problems. nitrus is not bad for your car as long as you dont abuse it. Ive got a nos set up and it hasnt given me any probls. basicly all the systems do the same shit it depends if you want a computer to control it or not. Ive got a 13.9 in the 1/4 mile with a 75 shot with 17inch rims on it so its pretty fast once you squeeze just remember you cant abuse your motor cause youll get jooked on your 1st squeeze.