Eng.Piston Set 4089421

positive OEM
Cummins
Part# 4089421
note
Complete piston assembly kit for diesel engine overhaul and repair.
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Extended Lead Time
non-returnable Non-returnable info
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Description

The Cummins Engine Piston Kit (4089421) is a critical component set designed to replace worn or damaged pistons within heavy-duty diesel engines. It serves to restore engine compression and combustion efficiency by providing a complete piston assembly for engine overhaul or repair applications.

Key Specifications

  • Application: Cummins diesel engines
  • Function: Converts combustion pressure to mechanical motion
  • Compatibility: ISB series engines
  • Construction: Forged steel and aluminum alloy
  • Features: Includes piston rings, wrist pins, and locking clips
  • Quality: OEM 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# 4089421
Type OEM
Part# variations 4089421 CUM,
4089421CUM
Manufacturer Cummins
Warranty Standard Manufacturer Warranty