I currently have a 150 shot on my car now do you think the car can hold a 175 shot direct port the car dosent seem to be stressing at all with the 150 shot I have a complete fuel system I've heard of people running 225 or 250 2 stage with stock internals and you know with single foggers some cylinders run more lean then others so direct port is the safest way to go when it comes to nitrous.