All of our VE injection pumps are built with what we call the "366" govenor spring. This will allow you to get higher RPM's out of your engine. VE injection pumps come with a one year warranty. If you're looking at adding a fuel pin, give us a call and we can install it for you. All our VE injection pumps are tested on a bench to ensure function, and we can even turn up the aneroid and timing slightly for additional flow and performance.