Cummins’ QSK50 Tier 4 Final drilling power modules have been developed to meet the stringent measures introduced by the Environmental Protection Agency (EPA). Tier 4 Final emission standards, in comparison to Tier 3 and Tier 2, represent a significant step towards reducing nitrous oxides (NOx) and particulate matter (PM). Indeed, the QSK50 Tier 4 Final drilling power module produces 45% less nitrous oxides and 85% less particulate matter than its Tier 2 predecessor.

The ISL G is the newest evolution of alternative fuel engine technology, combining all the advantages of clean-burning, natural gas engines with "no compromise" performance for medium duty truck, refuse truck, shuttle bus, urban transit, school bus, vocational and urban truck/tractor pick up-and-delivery applications. The ISL G meets current U.S. Environmental Protection Agency (EPA) and California Air Resource Board (ARB) emission standards and EPA greenhouse gas (GHG) and U.S. Department of Transportation (DOT) fuel consumption regulations.

Parented from the legendary KTA50, the QSK50 is designed, developed, assembled and tested inhouse by Cummins. Every component on the engine is built to provide optimum performance, reliability, and versatility for oil and gas well servicing applications requiring EPA Tier 2, China Stage 3 or non-emissionized standards. The complete well servicing package is backed by Cummins service network and warranty, ensuring greater uptime availability and increased rig efficiency.