Home/Cummins B-Series Parts — ISB, 6BT, 4BT & QSB/ISB631-133 Cummins ISB ENGINES ENGINE KIT
ENGINE KIT
Cummins · Models: ISB

ISB631-133 Cummins ISB ENGINES ENGINE KIT

Commercial diesel inframe / overhaul kits. Match the listed part and engine identifiers before ordering.
2-Year WarrantyPAI IndustriesMay Qualify for Free Freight
$1,421.84$1,626.59 Save $204.75
In Stock
Help us verify fitment

Provide every identifier you have. A specialist will use these details to confirm the application before fulfillment.

Secure Checkout Review Return Policy Warranty Details May Qualify for Free Freight
PAI Part #ISB631-133
JAK'S Part #JAKS-ISB631-133
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
Included Components

What’s In This Kit

Browse 7 included components with current product details and availability.

ISB631-133 Cummins ISB ENGINES ENGINE KIT
BrandPAI Industries
Part CategoryEngine Kits
Sub-TypeEngine Rebuild Kit
Engine MakeCummins
Engine ModelISB

ENGINE KIT

Fits:

  • CUMMINS ISB ENGINES

OEM cross-references:

  • 111622 4955365
  • 111620 4938619
  • 111088HP 4931041
  • 111209 3901706
  • 505160 4955251
  • 131850 4955354
  • 131753 4932210
  • 131692 3963379
  • 131693 3947530
  • 131761 3979769
  • 131846 4933235
  • 131849 5264566
  • 131725 3955339
  • 042017 4933628
  • 121289 3678603
  • 121298 3678786
  • 131843 5260648
  • 136100 3963991
  • 131694 4931365
  • 321249 6J2245
  • 321270 335853
  • 136102 3963990
  • 121227 3037537
  • 121194 3947270
  • 121350 3949688
  • 321287 8L2777
  • 121205 3089240
  • 136095 3954829
  • 192108 3955393
  • 136145 3976371
  • 121337 3977393
  • 132043 3999820
  • 121363 3973512
  • 131847 5260647
  • 131848 4933223
  • 131844 4933225
  • 131733 3949910
  • 131845 5266801

Warranty: 24 months