Cummins 3973493 Cylinder Head Assembly

This cylinder head assembly is engineered for Cummins 6C8.3, 6CT8.3, and 6CTA8.3 8.3-liter inline six-cylinder diesel engines. The casting features a 12-valve configuration (two valves per cylinder) with a 21-inch intake port design common to non-intercooled and aftercooled industrial variants. Manufactured from high-grade cast iron to withstand high thermal and mechanical stress cycles in heavy-duty applications. Key OEM cross-references include Cummins part numbers 3973493, 3911286, 4931026, C5363645, 3909416, 3917768, 3913111, and 3911287. Aftermarket interchange references include 3973493ASN and CM055-3973493AS-NL-BK. The component is compatible with engine models such as ISC 8.3L, QSC 8.3L, ISL 8.9L, QSL 8.9L, SAA6D114, and SAA6D107. Typical equipment fitment covers hydraulic excavators such as Komatsu PC300-6, Sany models, Liugong CLG856, and Zoomlion ZE360E, as well as Allis Chalmers 9755, 9765, 9775, and DT160 tractors. The bare casting weight is approximately 86 kg. Supplied in wooden case packaging for industrial shipping.