Replacement Exhaust Valve Insert for Caterpillar ® C9 Applications

1 x Exhaust Valve Seat 3/8 – 2128917

Fits Application: Caterpillar C9 / 3/8 Intake Valves, Marine / 5/16 Intake Valves

Application & Fitment

• Engine Make: Caterpillar
• Engine Model / Application: C9

Confirm the original part number and engine identification before ordering. Where applicable, also verify serial-number range, production year, piston style, bearing size or other configuration notes shown in the product information.

Part Numbers & Cross References

• Interstate-McBee Reference: M-2128917

Need Help Confirming Fitment?

Use the engine model, serial number and original part number when checking compatibility. For kits and sets, review the complete component breakdown above before ordering because contents can vary by engine configuration.