IS it possible to have large horsepower numbers with stock twins and only running like 14 psi with lots of other mods? I don't mean 800hp im talking 350-400 with porting and things like that.

 

Sure it is. There are people on this board making 350+RWHP on stock twins at about 15psi. All the bolt-ons, proper fuel and ignition setup, a good ECU, and a streetport should put you around that area with good tuning. I don't know how reliable the twins are at those boost levels, though. You'll get differing opinions.

 

i just like the set up i've heard they don't last as long at higher boost levels, but with porting, injectors, fuel pump, haltech ecu, intercooler and some piping it's possible?