Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L Inframe Engine Rebuild Kit, New (IF4089976Q)

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 never lose sleep wondering if you made the right choice with 4BTdiesel! Our rebuild kits are made to strict OEM Specifications giving you equal or better quality compared to the OE, at a much lower price.
• Plus, this brand new rebuild kit is manufactured and assembled in an ISO 2008:9001 certified facility, ensuring proper engine fitment and function. And since it is brand new,  there is no core charge! That is even more coin in your pocket!
• With this kit you will be restoring your engine to good working condition. Extending the life of your rig right into the next generation taking over the family business.
• These piston pins are hardened and tempered for improved strength and wear resistance. Ever hear of the Little Engine that could? I heard he had these piston pins and he’s racked up another million miles on that bad boy.
• Nobody likes a mystery puddle under their rig. That is why our gaskets are made of the correct  materials giving you excellent performance and leak free durability.
• Think you’re tough? These tri-metal connecting rod and main bearings are built with durability and will give you a run for your money.
• Receive unrelenting power with CNC turned pistons for precise tolerances. Simply put, quality and consistency you can count on.
• These oil control rings are designed with precise tangential tension for proper oil control. This will give you peace of mind that you are getting high quality and no leaks.
• Additionally, the sealing products are proudly made in the USA using 100% asbestos-free material. I think that this speaks for itself!
• At 4BTdiesel, we know that time is money and we want you back up and running as soon as possible. We have ASE techs on hand to answer all your technical questions. We’ll make sure that you are getting the right parts the first time.

Kit Contents:

• (1) Main Bearing
• (6) .5mm Piston Kits
• (12) Piston Pin Retainers
• (6) Piston Pins
• (6) .50mm Engine Pistons
• (6) .50mm Piston Ring Set
• (6) Top Piston Rings
• (6) Second Piston Rings
• (6) Oil Rings
• (6) Connecting Rod Bearings
• (6) Connecting Rod Bearings
• (1) Oil Pan Gasket
• (1) Flange Gasket
• (1) Upper Engine Gasket Set
• (1) O-Ring Seal
• (1) O-Ring Seal
• (6) Mid Range XPI Injector Seals
• (6) Gaskets
• (1) Intake Manifold Cover Gasket
• (1) Rocker Cover Gasket
• (1) Thermostat Seal
• (12) Valve Stem Seals
• (1) O-Ring Seal
• (1) O-Ring Seal
• (2) O-Ring Seals
• (1) Rocker Cover Housing Gasket
• (8) Sealing Washers
• (3) Sealing Washers
• (2) Sealing Washers
• (2) Gaskets
• (6) O-Ring Seals
• (6) O-Ring Seals
• (1) Oil Drain Gasket
• (1) O-Ring Seal
• (1) Cylinder Head Gasket
• (1) O-Ring Seal
• (2) O-Ring Seals
• (1) O-Ring Seal
• (2) O-Ring Seals
• (1) Turbocharger Gasket
• (1) Exhaust Connection Gasket
• (6) Turbo Hose O-Ring Seals

Warranty

6-month warranty.

What Rebuild Kit and Gasket Set Includes