How to & when is it actually needed? :?

Running 40lbs injectors would make it neccessary I am sure. Looking at the bore of the fuel rail from the past I would think it is ready to flow high rates of fuel but the FPR would be the issue.

Not sure though...I am sure a more educated answer will follow! :wink:

I just used a drill bit with some wd-40 and went at it slowly as not to warp or stall the bit or port extention. The piece potruding with o-rings on the top left pic of the fuel pressure regulartor are the ones I ported. They just come off easly with some pursueation with wd-40 or oil. DON"T yank them if they won't come out like fuel injectors.

Just looking at the poor little hole..I knew it won't support the fuel I needed for future plans of 350+hp.