Besides the simple bolt-ons like i/h/e, what can I buy for my 5th gen that will deliver the most power at a reasonable price (say 500-1000)? I don't want nos or anything cause I'm hella straight off ruining my motor. Thanks

 

Nitrous doesn't ruin your motor, people who don't use it correctly ruins motors. Do you already have i/h/e, and are just looking for more things to do. If not just get those, they are the easiest and cheaper power upgrades you can do. If you are looking for something else, wires, cam gears, ect....

 

Like ichibanjap said, NOS doesn't ruin your motor, its the dumb people who abuse it that will ruin a motor. You could get a set of Pullies, ignition, wires, or work on your suspension

 

Do your suspension first, Preludes were meant for handling, not drag. Shocks/coilovers/strut bars (front and rear)/camber kit (if necessary)/and some 215 tires