Cummins ISB 70 mm EGR Cooler Hose, PAI 121065 (OEM 3964999), Pack of 2
Used In These Kits
This part is included in 1 engine & overhaul kits — find yours below.
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141444Cummins ISB ENGINES EGR COOLER KIT Ships from supplier · Lead time confirmed when you order - No kits match that search.
Suggested Additional Parts
Commonly sold with this product. These parts are sold separately.
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121298Cummins ISX O-Ring Ships from supplier · Lead time confirmed when you order -
131847Cummins ISB ENGINES EGR CONNECTION GASKET (Pack of 5) Ships from supplier · Lead time confirmed when you order -
131675Cummins EGR VALVE GASKET (Pack of 2) Ships from supplier · Lead time confirmed when you order -
131733BREATHER GASKET (Pack of 10) Ships from supplier · Lead time confirmed when you order -
121235Cummins MULTIPLE O-Ring Ships from supplier · Lead time confirmed when you order
| Engine family | Cummins ISB / QSB / 6B 5.9 / 6.7 |
| Brand | PAI Industries |
| Part Category | Engine Components |
| Engine Make | Cummins |
| Engine Model | ISB |
| Condition | New |
| Stage / Tier | Standard |
Pack of 2.
PAI 121065 is a 70 mm egr cooler hose. Manufacturer application: Cummins ISB. Manufacturer specifies 70 mm length. Manufacturer parent reference: CUMMINS 3964999.
Manufacturer application table: CUMMINS ISB ENGINES.
Compare the complete part number, quantity and listed specifications with the required part before ordering.
PAI Part #: 121065
OEM References:
- CUMMINS 3964999
Applications:
- CUMMINS ISB ENGINES
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 |
|---|
| 3964999 |
| CUMMINS 3964999 |
| PAI 121065 |
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.






