Kohler offers two Tier 4 Final emission-compliant, heavy-duty diesel engines for the industrial, construction and agriculture markets. The Kohler 1.9-liter KDI1903TCR and the 2.5-liter KDI2504TCR engines are designed to offer optimized fuel consumption and limited emissions without a diesel particulate filter, using direct-injection system, cooled-exhaust gas recirculation and diesel-oxygenated catalyst. The high-pressure common rail system utilizes pressures at 2,000 bar (29,000 psi), resulting in better atomization of fuel, improved fuel consumption and a reduction in emission particulates. www.kohlerengines.com/home.htm