Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L Inframe Engine Rebuild Kit, New (IF4089950RGT)

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 have to worry about getting sub-par parts from 4BTdiesel! Our rebuilt kits are built to OEM specifications, giving you equal or better quality at a much lower price. You can’t beat that!
• You’ll have peace of mind knowing this brand new rebuild kit is manufacturedand assembled in an ISO 9001:2008 certified facility, ensuring quality and consistency you can count on.
• A brand new rebuild kit will restore your engine to good working condition and extend the life of it. What could be better than that?
• Keep your oil where it’s supposed to be with oil control rings designed with precise tangential tension for proper oil control.
• Nobody likes a leaky engine! That is why only the correct  gasket materials are used to give your engine excellent performance and leak free durability.
• This kit also includes graded multi layer steel cylinder head gaskets. This will give your engine the durability it needs while consistently out performing.
• You will receive optimal performance with CNC turned pistons utilizinggallery cooledtechnology. This means you get the quality and consistency that is needed while also allowing your engine to run at a higher temperature without overheating or compromising the strength anddurability.
• Speaking of durability, the connecting rod and main bearings are crafted with tri-metal giving your engine exactly that.
• Not to be out done, the Piston Pins have been hardened and tempered for improved strength and wear resistance.
• To top it off, the sealing products in this rebuild kit are proudly made in the USA using 100% asbestos-free material.

Kit Contents:

• (6) Connecting Rod Bearings
• (1) Main Bearing
• (6) Connecting Rod Bearings
• (1) Flange Gasket
• (1) Oil Pan Gasket
• (6) Piston Kits
•  (12) Piston Pin Retainers
•  (6) Piston Pins
•  (6) Engine Pistons
•  (6) Piston Ring Sets
•    (6) Oil Piston Rings
•    (6) Compression Piston Rings
•    (6) Compression Piston Rings
• (1) Upper Engine Gasket Set
•  (2) O-Ring Seals
•  (1) Turbo Hose O-Ring Seal
•  (1) O-Ring Seal
•  (1) Rocker Cover Gasket
•  (1) Seal
•  (6) O-Ring Seals
•  (1) Intake Manifold Cover Gasket
•  (1) Exhaust Recirculation Valve Gasket
•  (4) Connection Gaskets
•  (1) Rectangular Seal
•  (1) Turbo O-Ring Seal
•  (2) O-Ring Seals
•  (6) O-Ring Seals
•  (1) Thermostat Seal
•  (1) Copper Gasket
•  (1) Accessory Drive Cover Gasket
•  (1) O-Ring Seal
•  (1) O-Ring Seal
•  (2) O-Ring Seal
•  (21) Sealing Washers
•  (6) Midrange XPI Injector Seals
•  (6) O-Ring Seals
•  (1) Rocker Cover Housing Gasket
•  (4) Lock Plates
•  (1) Oil Drain Gasket
•  (3) Sealing Washers
•  (10) Sealing Washers
•  (4) Sealing Washers
•  (4) Sealing Washers
•  (2) Gaskets
•  (6) Exhaust Manifold Gaskets
•  (1) O-Ring Seal
•  (1) Cylinder Head Gasket
•  (1) Cylinder Head Gasket
•  (1) Turbocharger Gasket

Warranty

6-month warranty.

What Rebuild Kit and Gasket Set Includes