Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L Inframe Engine Rebuild Kit, New (IF3800785)

Think you know the truth about Aftermarket Rebuild Kits? We’d bet you’d be surprised.

It’s no secret, rebuilding your rig is one of the most labor (and wallet) intensive repairs out there. Sure, you want your engine to last another million miles but you also want the best price; so what should you choose- OEM or Aftermarket? 

When it comes to engine parts, the aftermarket often gets a bad rep. The idea that aftermarket retailers sell cheap parts with zero warranty, delivered in a beat-up box written in another language couldn’t be further from the truth. 4BTdiesel is here to set the record straight; we only sell Rebuild Kits with new parts, zero core charges, and a 6-month warranty. On top of only offering premium quality parts, we also make sure you save up to 50% off OEM prices. So, when it comes to your rebuild, what’s left to want? 

Need a little extra proof? Let’s talk Rebuild Kits.

• Engine on the fritz? Restore your engine back to good working condition with a new Inframe Rebuild Kit. It’ll extend the life of your engine to keep you running till the cows come home!
• To give you piece of mind, all components are built under strict OEM specifications.  Rest assured, your kit will fit within your engine and operate properly.
• Keep your engine sturdy over time with tri-metal constructed main and rod bearings made just for long lasting durability.
• Get more strength out of your cylinders! For maximum power, pistons are CNC turned with piston pins hardened and tempered for strong wear resistance. You can’t beat that!
• To really kick it up a notch, go another million miles with computer controlled piston machining. Simply put, this will maintain proper clearances for a smoother ride. 
• Leakage? Not with these gaskets! We ensure the correct materials are in place to ensure ultimate performance in both functionality and sealability! 
• To top it off, sealing products are also included that were proudly American made from 100% asbestos-free material.
• Put the OEM to shame! 4BTdiesel offers all new parts with the same, if not better quality, compared to the OE! Except, we offer it all for a much lower price with no core charge! Why not get more bang for your buck?
• Trust the experts with an Inframe Rebuild Kit that was manufactured and assembled in an ISO 9001:2008 certified facility. In other words, we make certain you will receive quality and consistency you can have confidence in.

Warranty

6-month warranty.

What Rebuild Kit and Gasket Set Includes