The Weiler B457 track feller buncher models have the latest Cat® C9.3 engine that produces 298 hp (222 kw) and meets U.S. EPA Tier 4 Final emission standards. A Tier 3 engine option is also available.  The B457 is a non-leveling model best suited for plantation thinning, biomass harvesting, and medium-production select or clear-cut applications; The B457  provide a leading combination of lift capacity, swing torque, and drawbar. Multi-function performance is achieved through dedicated pumps and optimized circuit configurations.  In addition, a standard or heavy counterweight option is available for a diversity of harvesting conditions. Unobstructed ground clearance enables unimpeded travel over stumps, rocks, and other debris.