Shopping for: Confirm the part against your engine serial number and application before ordering.
Change engine
Caterpillar · Models: C7
321481 Cat / Caterpillar C7 ENGINE O-RING
Commercial diesel seals / o-rings. Match the listed part and engine identifiers before ordering.
2-Year WarrantyPAI Industries
$17.89$19.46
Save $1.57
In Stock
PAI Part #321481
JAK'S Part #JAKS-321481
Kit Membership
Used In These Kits
This part is included in 2 engine & overhaul kits — find yours below.
| Brand | PAI Industries |
| Part Category | Gaskets & Seals |
| Sub-Type | O-Ring |
| Engine Make | Caterpillar |
| Engine Model | C7 |
O-RING
Fits:
- CATERPILLAR C7 ENGINE
OEM cross-references:
- CATERPILLAR 6V5166
Warranty: 24 months
Discovery models are listed below. Confirm the complete application and any ESN/CPL or size restrictions before ordering.
Caterpillar C7
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.