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Fortpro Lower Gasket Set for Cummins 4B Series - Replaces 3802375 | F020637

Fortpro Lower Gasket Set for Cummins 4B Series - Replaces 3802375 | F020637

SKU: F020637

Availability: In Stock

Stock Level: Only 1 left in stock - Order Soon!

Shipping: Calculated at Checkout

Regular price $75.22 USD
Regular price Sale price $75.22 USD
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Shipping calculated at checkout.

About this Item

  • Designed specifically for the maintenance and repair of Cummins 4B Series diesel engines, ensuring effective sealing of the lower parts of the engine.
  • Compatible with all variants of the Cummins 4B series, including the popular 4BT and 4BTA models, ensuring a perfect fit and avoiding incompatibility issues during installation.
  • Produced with high quality materials that meet or exceed OEM specifications, offering a reliable and durable solution for diesel engine rebuild and repair.
  • Manufactured to withstand the harsh operating conditions of heavy-duty truck diesel engines, providing a long-lasting solution to leaks and other problems related to gasket wear.
  • Directly replaces Cummins OEM part number 3802375, ensuring a smooth transition in repairs and maintenance, without the need for additional modifications.


Maximize the Efficiency and Reliability of your Engine with the Fortpro Lower Gasket Set for Cummins 4B Series. When it comes to keeping your Cummins 4B Series engines running like new, there is no better option than the Fortpro lower gasket set. Specifically designed to match the rigorous demands of heavy-duty trucks and machinery that depend on the 4B Series, our gasket set ensures optimal performance and unwavering reliability. Each component has been meticulously manufactured from the highest quality materials, exceeding OEM specifications to offer a superior solution that not only replaces, but improves the seal of your engine.


  • Brand: Fortpro
  • Vehicle Type: Semi-Trucks / Heavy Trucks
  • Product Department: Engine
  • Product category : Cummins Parts
  • Part Type: Lower Gasket
  • OEM Reference #: 3802375
  • Material: Composite
  • Applications:
    Cummins 4B Engine
    Cummins 4BT Engine
    Cummins 4BTA Engine

BOM (Bill of Materials):

  • Gasket Kit OEM Reference: 131402-100 pcs x 1
  • Rear Crankshaft Seal OEM Reference: 3909410 pcs x 1
  • Front Seal Kit OEM Reference: 3802820 pcs x 1


  • Cummins: 3802375 3802266 3802019
  • PAI: 131402.

Shipping Policy

In order to send your purchase, our company may use different freight companies like USPS, UPS and some 3erd Carrier Services for Oversize orders, this will not affect the final price of your order. We will send you all the information in due time. 

For Free Shipping and Freight/Oversize Shipments they are some special term you may check at our Terms & Conditions page.


Return Policy

If for any reason you need to return a purchased item, we have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

To be eligible for a return, your item must met the conditions stablished in our Terms & Conditions.

To start a return, you can contact us at


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