Cams and head work will do wonders if done correctly....... What about the rest of your exhaust system after the headers? U Got to go with either highflowing cats, and you should really consider highflowing oval mufflers (the stock mufflers are oh soooo restrictive).... Also if your doing cams, intake, head work, and exhaust headers, you should really consider installing a piggyback ECU system to really help you tune out the engine to peak performance.... You could pull as much as 35-45 more horsepower with those little exhaust mods and an ECU piggyback...Topend will be nicely increased....