I was wondering whats the , the most effective performance mod for a reasonable price. im getting a K&N air filter soon so i was wondering if anyone has ideas for me

 

The perfect starting point for modding is the filter and exhuast, if only a performance muffler. Every other mod will build on these two which allow the engine to suck it in and blow it out. You can then work your way up to headers, y-pipe, CAI, etc (ex: fuel pressure riser)...then end with the ECU.