i have a 94 integra. what would you recommend for me to put on in. has 2.5 " a'pexi exhuast and a k@n cold air intake already. also has headers, throttle body spacer.

 

Turbo? Big cams, and some high comp pistons? Supercharger?

Bolt-ons, such as i/h/e Really won't yield you much on a stock engine,
Turbo will def be cheaper/easier to make more hp then all motor,
but you have to figure out what you actually wanna do.

And of course you need more time to make sure everything is kept together.