i have a b&m fuel pressure gauge on top my fuel filter. i stay between 41 and 47 psi. The shop i go to is one of the best around i guess. The problem is there are none around. I live in Maryland southern maryland actually. I live right next to the patuxent river so i am at a low altitude. The shop i go to tells me that the header and catalytic converter are hindering 30hp but I think that is a bit extreme. They say if I put a toda header and test pipe i will be well over 200hp to the wheels. I dont think that is all that is wrong. I dunno what else to do. Thanks for your help. I will look for a different shop besides tempest racing