4S8903 Exhaust Valve Insert for Caterpillar

The 4S8903 is an exhaust valve insert used in Caterpillar equipment. It is installed in Caterpillar engines, generator sets, generators, and industrial engine applications. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The part is identified as an exhaust insert for the listed Caterpillar engine and power-generation applications. The supplied fitment data includes several Caterpillar engine models and the SR4 generator series. Model designations are listed below as provided for this part number.

Fitment

• Caterpillar 3408 engine
• Caterpillar 3408B engine
• Caterpillar 3408C engine
• Caterpillar 3408E engine
• Caterpillar 3412 engine
• Caterpillar SR4 generator

The equipment categories associated with the 4S8903 exhaust valve insert are Caterpillar engine-machine applications, Caterpillar engine-generator-set applications, Caterpillar generators, and Caterpillar industrial engines. Compatibility should be checked against the engine model and the part number installed in the specific machine or power unit.

Cross-reference numbers

The number 4S8903 is also written in Caterpillar format as 4S-8903. These designations refer to the same exhaust valve insert reference stated in the product data.

Specifications

The listed dimensions and weight correspond to the supplied product data. The description does not specify the insert material, valve-seat angle, bore diameter, outside diameter, or installation kit contents.