FULL RESULTS-BLOWN 302 POWER MODIFICATIONS, BOOST, EXHAUST, HEADS & CAM. Do supercharged motors really benefit from increased exhaust flow? How about increased head flow? How well does your average shelf performance cam work under boost? What happens to the boost curve when you make performance mods? Check out this test where we add long-tube headers, aluminum heads, a Comp cam and more boost to a supercharged 5.0L 302.