Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L Inframe Engine Rebuild Kit, New (IF4955337)

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.

• Extend and restore the life of your engine with a brand new Inframe Rebuild Kit built to OEM specifications to ensure it has proper fit and function within your engine.
• Who wouldn’t want long lasting durability? To ensure maximum performance pistons are CNC turned to precise tolerances and include computer controlled piston machining to maintain proper clearances.
• But that’s not all! Additionally, connecting rod and main bearings are crafted with tri-metal materialfor durability to help your rig go another million miles.
• Release unrelenting power within your engine with piston pins hardened and tempered for improved strength and wear resistance.
• 4BTdiesel wants to help you get more bang for your buck! With your Inframe Rebuild Kit enjoy all new parts that have equal or better quality compared to the OE, all while paying a much lower price and no core charge!
• Keep proper oil control within your pistons with oil control rings designed with precise tangential tension. You can’t beat that! 
• Drive comfortably knowing the sealing products are made in the USA with 100% asbestos-free material to ensure gaskets have excellent performance in functionality and sealibility. 
• Why sacrifice quality if you don’t have to? We make certain all rebuild kits are manufactured and assembled in an ISO 9001:2008 certified facility to ensure you are receiving quality and consistency you can rely on.

Kit Contents:

• (1) Main Bearing Set
• (1) Thrust Bearing
• (6) Main Bearings
• (7) Main Bearings
• (1) Lower Thrust Bearing
• (6) Connecting Rod Bearings
• (1) Oil Pan Gasket
• (1) Oil Suction Connection Gasket
• (6) Piston Kits
• (12) Piston Pin Retainers
• (6) Piston Pins
• (6) Piston Engines
• (6) Piston Ring Sets
• (6) Oil Rings
• (6) Compression Rings
• (6) Compression Rings
• (6) Connecting Rod Bearings
• (1) Oil Pan Gasket
• (1) Upper Engine Gasket Set
• (1) O-Ring Seal
• (1) Thermostat Seal
• (5) Sealing Washers
• (1) Sealing Washer
• (7) Sealing Washers
• (2) Gaskets
• (6) Injector Seals
• (6) O-Ring Seals
• (2) O-Ring Seals
• (2) Turbocharger Oil Drain Gaskets
• (2) O-Ring Seals
• (1) Accessory Drive Cover Gasket
• (1) O-Ring Seal
• (1) Valve Cover Gasket
• (1) Rocker Lever Housing Gasket
• (1) Oil Drain Gasket
• (1) Cylinder Head Gasket
• (1) O-Ring Seal
• (6) Exhaust Manifold Gaskets
• (1) O-Ring Seal
• (1) Seal
• (2) Turbocharger Hose O-Ring Seals
• (2) O-Ring Seals
• (1) Intake Manifold Cover Gasket
• (1) Turbocharger Gasket

Warranty

6-month warranty.

What Rebuild Kit and Gasket Set Includes