I use to have a full bolt on kproed rsx. It was pretty damn good for what it was. If you want to start touching internals. Usually the 06+ TSX cams are more aggressive than the JDM ITR cams. The RBC manifold is a must. DC sports race header is good for its price but if you want power, Buddy Club Race Header or SSR header is the way to go. Go on clubrsx, you'll learn alot there.