121233 Cummins 855 / 6B 5.9 / ISB O-Ring
Used In These Kits
This part is included in 19 engine & overhaul kits — find yours below.
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131263Cummins LOWER GASKET SET In stock -
131329-154Cummins 855 ENGINES FUEL SYSTEM O-RING SET In stock -
131380UPPER GASKET KIT In stock -
131489ROCKER BOX GASKET KIT In stock -
131726LOWER GASKET KIT In stock -
131739Cummins QSB SERIES ENGINE LOWER GASKET KIT In stock -
131746Cummins LOWER GASKET KIT In stock -
131799LOWER GASKET KIT In stock -
131811Cummins ISL SERIES LOWER GASKET KIT In stock -
131830Cummins QSB SERIES ENGINE LOWER GASKET SET In stock -
131856Cummins LOWER GASKET KIT In stock -
131859Cummins ISL SERIES LOWER GASKET KIT In stock - 131885LOWER GASKET KIT View ›
- 131896UPPER GASKET KIT View ›
- 131899LOWER GASKET KIT View ›
- 132045-170BLOCK GASKET SUB KIT View ›
- 132090LOWER GASKET KIT View ›
- 132109-156EXHAUST GASKET KIT View ›
- 331220ENGINE OVERHAUL GASKET KIT View ›
- No kits match that search.
Suggested Additional Parts
Commonly sold with this product. These parts are sold separately.
| Brand | PAI Industries |
| Part Category | Seals & O-Rings |
| Sub-Type | O-Ring |
| Engine Make | Cummins |
| Engine Model | 855 · 6B 5.9 · ISB · QSB · 4B 3.9 |
| Condition | New |
| Stage / Tier | Standard |
Cataloged cross-reference numbers for this product. Confirm fitment before ordering.
| Number |
|---|
| 4J8996 |
| 8T8099 |
| 3046364 |
| 3058653 |
| 3910260 |
| 68515 |
| 3000521 |
| 499368C1 |
| 3H0107 |
| 1577-3000521 |
No cross-reference numbers match that search.
Discovery models are listed below. Confirm the complete application and any ESN/CPL or size restrictions before ordering.
Most PAI parts carry a 2-year unlimited-mileage PAI warranty — 3 years on the High Performance tier, 1 year on Excel by PAI. See Warranty & Returns for full coverage terms, or call a specialist to confirm the exact coverage on this part.
PAI published warranty tiers: High Performance — 3-Year · Genuine PAI — 2-Year · Excel — 1-Year, unlimited mileage. The badge beside the price shows this product's recorded term; when no badge is shown, confirm coverage with a specialist.