The M Series S450 skid steer loader replaces the K Series S130, and the M Series T450 reintroduces a compact-track-loader platform size that has not been available from the company in recent years. These 400 frame-size machines mark the final family of loaders to join the Bobcat M Series range. A new 2.4-liter, Tier 4-Final Bobcat engine features an ultra-low-particulate combustion system that varies cylinder pressure with the load on the machine and requires no diesel particulate filter. Horsepower ratings are 49 for the S450 and 61 for the T450. Rated operating capacities are 1,300 pounds for the S450 and 1,400 pounds for the T450. Both models produce an auxiliary-hydraulic flow of 16.7 gpm at 3,300 psi.