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.
no it all depends on tuning you can get more then a 100 hp gain on 9 psi.. just matters ur setup (forexample a v8 running 9 psi will make more then 200 hp more tuned)