Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L Inframe Engine Rebuild Kit, New (IF3800842)

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.

• You’ll receive a brand new rebuild kit that will restore your engine to top-notch working condition and keeps it running for another million or more miles.
• Want to beef up your engine? You got it! Tri-metal connecting rods and main bearings are included to upgrade your engine’s durability.
• We put the OE to shame with exceptional quality and consistency. This rebuild kit goes through a strict manufacturing and assembling process at an ISO 9001:2008 certified facility. We emphasize quality here at 4BTdiesel and this kit will deliver the utmostsatisfaction.
• Plus, our quality is equal to or superiorthan the OE’s at a much lower price, keeping cash in your pocket. But, the fact that all new parts are included and there is no core charge helps rake in the savings as well.
• Let’s talk Pistons. You’ll have peace of mind knowing the pistons included are CNC turned to precise tolerances, and are computer control machined to proper clearances. It doesn’t get much better than that!
• Want improved strength and wear resistance? We’ve got you covered. Piston pins are hardened and tempered to give you the best of both. 
• Oil control rings are included and they are designed with precise tangential tension for proper oil control. You can’t beat a well oiled machine!
• Leakage? Never heard of it. The sealing products within this kit are proudly USA made and use 100% Asbestos-Free material. Additionally, the correct materials are used in the crafting of the gaskets ensure ultimate performance in functionality and sealability.
• You’ll get back up and running in no time since all parts are built to OEM specifications, giving you the best of fit and function.

Kit Contents

• (6) 1.0mm Piston Kits
• (6) Piston Pins
• (12) Piston Pin Retainers
• (6) 1.00mm Engine Pistons
• (6) 1.00mm Piston Ring Sets
• (1) Main Bearing
• (6) Connecting Rod Bearings
• (6) Connecting Rod Bearings
• (1) Oil Pan Gasket
• (1) Gasket
• (1) Upper Engine Gasket Set
• (2) O-Ring Seals
• (1) Turbo Oil Drain Gasket
• (1) Intake Manifold Gasket
• (5) Isolators
• (12) Valve Stem Seals
• (12) Valve Stem Seals
• (6) Gaskets
• (2) Gaskets
• (1) Turbocharger Gasket
• (1) Cylinder Head Gasket
• (1) Turbocharger Gasket
• (6) O-Ring Seals
• (1) O-Ring Seal
• (1) Sealing Washer
• (2) Turbo Hose O-Ring Seals
• (1) O-Ring Seal
• (1) Valve Cover Gasket

Warranty

6-month warranty.

What Rebuild Kit and Gasket Set Includes