New Injector O-Ring Set (6-Pack) for Cummins ISX DOHC Engines

This injector O-ring set is designed specifically for Cummins ISX DOHC (Dual Overhead Cam) engines. It includes six full O-ring kits—enough to service all injectors in a 6-cylinder engine. Manufactured with high-temp, fuel-resistant materials, these O-rings help ensure a proper seal and prevent leaks, blow-by, and fuel system pressure loss.

Part Number: 121309
Fits: Cummins ISX DOHC engines (including CM570 and select CM870 variants)
Includes: O-ring sets for 6 injectors
Condition: New, high-quality aftermarket replacement
Application: Injector to cylinder head sealing
Features & Benefits:
- OEM-quality sealing performance
- Heat and fuel resistant for long service life
- Restores proper injector function and prevents fuel leaks
- Direct-fit design for easy installation

Weight
Dimensions

We offer free standard ground shipping within the USA! If you need your parts in a hurry and would like to get them overnighted or expedited, please give us a call !

NOTE - CUT OFF TIME FOR SAME DAY SHIPPING IS 3PM CENTRAL TIME. ORDERS PLACED AFTER 3PM WILL SHIP OUT NEXT BUSINESS DAY. NEXTDAY SHIPMENTS THAT DO NOT ARRIVE ON TIME ARE NON-REFUNDABLE.
-FOR ORDERS INCLUDING HEAVY ITEMS(INFRAME KITS, HEADS,ETC.) WILL BE PLACED ON A SHORT HOLD WHILE WE VERIFY ADDRESS AND SHIPPING IS CORRECT.

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

NOTE - All open orders will have a 20% restocking fee. All returns will have a shipping fee.

1 YEAR WARRANTY

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