If he offered a number 4 plate I would be buying one from him. I emailed him about it and he said not at this time. So I ground my stock plate, I tried to duplicate a 5 plate as much as I could. I've never have seen a number 4 plate, anybody have a pic? Side view? I know I can't exactly duplicate a 5 because the jut-out protrudes more than the stock plate is, so I'm guessing I have the power output of maybe a 6. Thats still not bad considering it was a completely free 75+ HP. Boy was it a major difference too, it was like I wasn't driving the same truck!