We have used S&S lifters and valvetrain components almost exclusively day in/day out here, for almost 2 decades now, as we then can rest assured that the clients best interest has been held at the forefront of the building/engineering process, and solid, long-lasting engine operation will occur.
Scott

 

I had a knock in my twin cam last year when the bike was warm . Turned out to be the compensater bolt was loose. I replaced the bolt and torqued it , noise went away .