Caterpillar Finished Valve Guide, PAI 391991 (OEM 1737188), Pack of 6
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| Brand | PAI Industries |
| Part Category | Valvetrain |
| Engine Make | Caterpillar |
| Engine Model | 3400 |
| Condition | New |
| Stage / Tier | Standard |
Pack of 6.
PAI 391991 is a finished valve guide for intake and exhaust use in Caterpillar 3412 Series applications. The manufacturer-designated reference is Caterpillar OEM 1737188.
Compatible Engines
PAI lists Caterpillar 3400 Series applications. Match the original part number and listed application.
PAI lists these manufacturer references: Caterpillar 173-7188; Caterpillar 1737188; Caterpillar 4N2803; Dana Corporation/Private Brand Sale 217-3259.
Compare the complete part number and required specification before ordering.
PAI Part #: 391991
OEM References:
- CATERPILLAR 173-7188
- CATERPILLAR 1737188
- CATERPILLAR 4N2803
- DANA CORPORATION/PRIVATE BRAND SALE 217-3259
Applications:
- CATERPILLAR 3400 SERIES
Warranty: 2.0 year(s)
These catalog references may identify this part or components in an assembly. A listed number alone does not confirm whole-assembly interchange or vehicle fitment. Confirm the required part before ordering.
| Number |
|---|
| 173-7188 |
| 1737188 |
| 4N2803 |
| CATERPILLAR 173-7188 |
| CATERPILLAR 1737188 |
| CATERPILLAR 4N2803 |
| DANA CORPORATION/PRIVATE BRAND SALE 217-3259 |
| PAI 391991 |
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.





