Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L Inframe Engine Rebuild Kit, New (IF3800784)

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.

• A new Inframe Rebuild Kit built to OEM specifications will have proper fit and function needed to extend the life to your diesel, while also restoring it.
• Want lasting quality and consistency? You’ve got it! Your rebuild kit is manufactured and assembled in an ISO 9001:2008 certified facility. 
• Want durability? 4BTdiesel has got you covered! Rod and main bearings are constructed with a tri-metal material for longevity.
• Put more power in your cylinders! Pistons are CNC turned to make sure precise tolerances are met while they also use computer controlled machining in order to maintain proper clearances.
• Don’t settle for sub-par parts! Hardened and tempered for improved strength and wear resistance, these piston pins will keep your engine going for another million miles.
• Oil control rings are included and they are designed with precise tangential tension for proper oil control. Let’s keep your diesel a well oiled machine!
• Leakage? Not with these gaskets! Correct materials are used within this high quality gasket set are in place to have ultimate performance in functionality and sealibility.
• You will be able to trust these American made sealing products made up of 100% asbestos-free material to stop up any leaks wanting to spread.
• Get more bang for your buck! This Inframe Rebuild Kit is composed of all new parts and will not include a core charge! Additionally, you’ll be paying a lower price compared to the OE, but still receive equal or better quality!

Kit Contents:

• (6) .50mm Piston Kits
• (6) .50mm Piston Ring Sets
• (6) .50mm Top Rings
• (6) .50mm Second Piston Ring
• (6) .20mm Oil Piston Ring
• (12) Piston Pin Retainers
• (6) Piston Pins
• (6) .50mm Engine Pistons
• (1) Main Bearing
• (1) Gasket
• (12) Connecting Rod Bearings
• (1) Oil Pan 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