I was thinking at most a 75, and even that on rare occasion, most likely a 50... but who makes direct port? what dioes it take to install it?... i see NX makes a kit that replaces the whole fuel rail. is that good? heh ive enver even dealt or given nitrous searious thought so i onmly know very little. also what kind of build do you do for the motor? i'm wanting to replace a few simple things like cams and such.. mot likely no pistons or rods. do you build it like a n/a car?