Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L Lower Gasket Set, New (4089956)

These aren’t your grandpa’s gaskets.

A blown gasket can be anything from a minor annoyance to leaving you stranded on the side of the road. You don’t have to put up with whatever gasket you can get your hands on; our gaskets are engineered to withstand anything you throw at it and last well into another million miles. No doubt about it, these are some of the best gaskets on the market.

It’s no secret that diesel engine parts can cost an arm and a leg. That’s where 4BTdiesel steps in. We offer premium aftermarket gaskets at up to 50% off OEM prices. While most believe aftermarket retailers sell cheap gaskets with zero warranty, packed in a dusty box from who knows where, 4BTdiesel is here to kick that stereotype to the curb. 4BTdiesel provides gaskets fabricated for unstoppable performance and a 6-month warranty. How’s that for an aftermarket part?

Need a little extra proof? Let’s talk shop.

• Want a gasket set that will keep your engine running until the cows come home? You got it! This brand new gasket set is manufactured and assembled in an ISO 9001:2008 certified facility. This ensures top-notch quality and consistency that you can count on.
• Plus, the standards followed are stricter than a dad with his daughter’s boyfriend. Fit will be exact, and functionality will be optimal. 
• To top it off, you’ll get the most for your money because quality meets or exceeds the OE’s at a much lower price. It doesn’t get much better than that!

What Rebuild Kit and Gasket Set Includes

Warranty

6-month warranty.