I see the recommended max bore is 4.060 wtf?
I’ve seen many running 4.100 and as much as 4.165 and claim they’ll go 4.180
I’m sure there’s variances in manufacturing that dictate how far we can go.
Do your sonic test. You may be surprised. The X blocks I've tested would all go 4.100 or better. In fact, I think 4.125 was the least I'd see them go. The book claims 4 inch is all the X block will go but they go more than that.
