When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
depends on how much you are willing to spend and how much extra you looking for?? if you want an extra 20, then new carb and intake manifold. should run you about 400 if you can install it all your self.
Anything to make it breathe better, and burn the fuel more efficiently will add HP. Aluminum after market heads, intake manifold, 4v carb, headers, dual exhaust with H or X pipe and electronic ignition all play an important role, but these parts have to be coordinated. Just slapping on a 4V carb and not changing anything else will give you very little more HP.
remember....the better it breathes...the better it drinks gas......not sip....but more like chugs......so dont cripple yourself finacially and not be able to afford it afterwards....