I recently put an air intake, headers, and a straight trough exhaust on my D15 powered hatch. And I was wondering what the car might run on the track. And if some one could give me an estimate of how much power i might have gained.

 

typically you can gain anywhere from 10-25 hp with intake, header, exhaust...25 being extremely good...it depends on what kind of i/h/e you have too, some make better power than others