I've had a set of Venom Performance fuel injectors and one went bad. Talked with American Muscle and they sent me a new set. My old set had the single pintle design common to the EV1 style, but the new ones they sent me are EV1's but they have the 4 pintle design just like the EV6! Win! I took a closer look and noticed that on most of the injectors, some of the pintle holes are extremely small, almost non-existent, and some are fairly large. Only 3 injectors had consistent hole sizes. I was wondering if I could enlarge some of these holes with a razor blade or if doing that would mess up the flow rate of the injector and I should let them be. On a side note, I don't recommend anyone getting injectors from Venom High Performance. As far as I'm concerned, they don't offer a very good product. I may be wrong, but I'm just spreading the word of the problems I'm having with them.