Home/Cummins B-Series Parts — ISB, 6BT, 4BT & QSB/ISB631-201 Cummins ISB ENGINES ENGINE KIT
ISB631-201 Cummins ISB ENGINES ENGINE KIT
Cummins · Models: ISB

ISB631-201 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$1,605.44 Save $183.60
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 #ISB631-201
JAK'S Part #JAKS-ISB631-201
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 5 included components with current product details and availability.

Complete The Rebuild

Suggested Additional Parts

Commonly sold with this product. These parts are sold separately.

  1. Cummins CAM BEARING
    151528Cummins CAM BEARING In stock
    $6.00View ›
  2. Cat / Caterpillar C15 ACERT ENGINE WATER PUMP GASKET KIT
    331606Cat / Caterpillar C15 ACERT ENGINE WATER PUMP GASKET KIT In stock
    $40.75View ›
  3. Cat / Caterpillar OIL COOLER
    341400Cat / Caterpillar OIL COOLER In stock
    $716.68View ›
  4. TURBOCHARGER GASKET
    131907TURBOCHARGER GASKET In stock
    $12.19View ›
  5. Cat / Caterpillar EXHAUST MANIFOLD KIT
    340106Cat / Caterpillar EXHAUST MANIFOLD KIT In stock
    $124.70View ›
ISB631-201 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:

  • 111625 4956007
  • 111623 4938620
  • 111088HP 4931041
  • 111209 3901706
  • 505164 4955480
  • 505165 4931042
  • 505166 4934282
  • 505167 4932802
  • 1274 G
  • 131754 4955229
  • 131753 4932210
  • 131791 4899226
  • 131792 4899231
  • 042025 3823921
  • 131861 5255450
  • 042152 5271613
  • 131511 3931604
  • 131693 3947530
  • 121362 3867646
  • 131725 3955339
  • 121289 3678603
  • 131603 3919369
  • 321270 335853
  • 321249 6J2245
  • 131694 4931365
  • 136145 3976371
  • 121337 3977393
  • 136102 3963990
  • 321287 8L2777
  • 121361 2830409
  • 121258 3906698
  • 136095 3954829
  • 136103 3963988
  • 131757 4896897
  • 321241 5P7813
  • 321222 1171385
  • 121322 4010643
  • 131798 4955230

Warranty: 24 months