Manifold fits 2002-2015 Cummins ISX CM870, CM871, CM2250/2350 Engines; Pulse exhaust flow directed to the dual volute T6 turbine improves turbo spooling response for quick clean power; Three piece thick walled durable high-silicon ductile iron casting prevents cracking; Borg Warner S478, S410SX Turbos replace the costly HE500 series turbo that results in lower maintenance cost, less breakdowns; Programming required