Flexible Hose 3978421

positive OEM
Cummins
Part# 3978421
note
OLD# 3976291
Flexible hose for oil transfer in commercial truck engine systems
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Extended Lead Time
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Description

The Cummins Flexible Hose (3978421) is a fluid conduit designed to transport essential liquids within commercial truck systems. It provides a flexible connection that accommodates engine vibrations and movement, ensuring continuous fluid flow and system integrity. This hose is critical for maintaining fluid circulation in dynamic vehicle environments.

Key Specifications

  • Application: Tier 3 5.9L ISB/QSB engines
  • Function: Transfers oil between pump and full flow oil filter
  • Compatibility: ISB, QSB engine series
  • Construction: Reinforced rubber with pressure-resistant layers
  • Features: Kink resistance, vibration accommodation, heat and pressure tolerance
  • Quality: OEM Cummins part

Shipping Info

Next Day Air services are available for In Stock items. Our shipping cutoff time is Monday - Friday 4:30pm Eastern Standard Time (EST). 

 

For more shipping information, please see our Shipping & Delivery page.

More Information

Current Part# 3978421
Old Part No.: 3976291
Type OEM
Part# variations 3978421 CUM,
3978421CUM
Manufacturer Cummins
Warranty Standard Manufacturer Warranty