This spring has more side belt and torsional (twisting) pressure that the Arctic Cat yellow 0148-227 spring. This spring is a .218 wire four coil at stock length. It has less compression (side force) than the Red/White, but has more torsional (twisting) force than the Red/White. This spring can be used in both roller clutches or with stock button/helix use. Ideal for use on heavy snowmobiles in 800cc to 1000cc class or on larger than 55° helix set ups.It also works excellet for drag racing. This spring will not fit Diamond drive models.