Home/Cummins B-Series Parts — ISB, 6BT, 4BT & QSB/Cummins BELT TENSIONER
Cummins BELT TENSIONER
Cummins BELT TENSIONER
Cummins BELT TENSIONER
Cummins BELT TENSIONER
Cummins BELT TENSIONER
Cummins BELT TENSIONER

Cummins BELT TENSIONER

BELT TENSIONERFits: CUMMINS 4B ENGINES 3.9 CUMMINS 6B ENGINES 5.9 OEM cross-references: CUMMINS 3914086 CUMMINS 3917485 CUMMINS 3922900 CUMMINS 3934818 CUMMINS 3936201 CUMMINS 3937553 CUMMINS 3964636 CUMMINS 3967188 CUMMINS 3978022 Warranty: 12 months
Warranty BackedQuality AftermarketFree Freight
JAK'S Part #JAKS-180891E
$74.99
In Stock — Ships Today if ordered by 3:00 PM MT
Drop in your engine serial number and a JAK'S tech double-checks this part fits before your order ships — no guesswork.
Secure Checkout 30-Day Returns Warranty Backed Ships Same Day
Not sure it's the right fit? Call a specialist
(720) 445-6249
Talk to a tech or text a photo of your part tag — we'll confirm fitment before you buy

BELT TENSIONER

Fits:

  • CUMMINS 4B ENGINES 3.9
  • CUMMINS 6B ENGINES 5.9

OEM cross-references:

  • CUMMINS 3914086
  • CUMMINS 3917485
  • CUMMINS 3922900
  • CUMMINS 3934818
  • CUMMINS 3936201
  • CUMMINS 3937553
  • CUMMINS 3964636
  • CUMMINS 3967188
  • CUMMINS 3978022

Warranty: 12 months

Warranty Backed. Every part is covered against defects in materials and workmanship. Call a specialist for the coverage details on this part.

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