My 1999 Electra Glide Ultra Classic with a big bore kit and mild cam was spitting oil from the breathers into the throttle body and down out of the air filter. Sorry but I can’t have one drop of oil on the ground. Bought the Trask kit and installed it. One thing the directions didn’t say was that you had to take the rocker assembly off to drill the oil stands. No big deal (come to think of it how else could you drill the oil stands). Major league success story. No more oil / breather problem. Period. Glad I did it. Took me a while but I wanted to be extra careful. Thanx Trask!