GRIND - 583 SERIES. Optimized for use as a grat overall Cam for Softail and Dyna, but can be used in any Big Twin. Provides strong low-end tourque and horsepower you can really feel. Strongest from 1500-5000 RPM in a Softail or Dyna application.
S&S has no issues with poor construction materials or design parameters. I went with the kit due to my 50+ years of riding Harleys & using S&S products.