05 - 07 M-Series / Crossfire. Made from 1/2" HDPE with a textured finish, these running board inserts put a end to snow build up on your boards. Designed to complement the stock running boards leaving as much of the stock board behind as possible. Fastens to your sled using included stainless hardware. Stainless nylock nuts double as traction, making for a truly slip free running board. (Note:an air body saw is recommended for installation.)