What is the benefit of changeable manifolds or exhaust flanges? More junk to buy?
It is cheaper to bore an iron sleeve, but you also have to bore them more because they are more prone to sticking. My last nikasil job cost me 180. That is two bores. I didn't even need to nikasil my cylinder, but after two years of racing, I figured I just should (This is on my DMX, not a cub).
Twisters have better cooling? How do you prove this? My DMX runs at 105 degrees after a pass, and I don't even have a radiator. Does yours run cooler than that?