if you read mags with upgrade articals, headers dont really do much for the price its for. go with the little things that add up for great hps. like ignition, grounding, catback, fuel rail, fuel injectors,underdrive pulley, light weight flywheel, stuff like that....dont waste you money spending 600 bucks on an exhaust system that will only get you 20 or 30 horses if your lucky.