Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L Inframe Engine Rebuild Kit, New (IF4955481)

Think you know the truth about OE Rebuild Kits? We’d bet you’d be surprised.
If we tried to sell you used parts for your Rebuild, you’d call us crazy. But, if you’ve ever bought an OE Rebuild Kit, you may have unknowingly paid a premium for used parts! Replacing used parts with more used parts!?! That sure doesn’t sit right with us. How about you?

When it comes to engine parts, the aftermarket often gets a bad rep. The idea that the aftermarket retailers sell cheap parts with zero warranty, delivered in a beat-up box written in another language is just plain wrong. 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. Now, doesn’t that sound more like the parts you should be installing in the biggest investment of your career?

Need a little extra proof? Let’s talk Rebuild Kits.

• Trust in an all new Inframe Rebuild Kit built to strict OEM specifications to ensure it fit and works properly within your engine.
• Time to seal the deal! Stop leakage with American made sealing products composed of 100% asbestos-free material.
• Ready to beef up your engine? Tri-metal materials are used while constructing rod and main bearings for long lasting sturdiness. 
• Keep oil in it’s place with oil control rings designed with precise tangential tension for proper oil control. 
• We know pistons are the powerhouse of your diesel. To ensure pistons are top-notch, they’re CNC turned to precise tolerances and use computer controlled machinery to maintain proper clearances.
• Here at 4BTdiesel we know how much quality matters while buying aftermarket. To ensure you get the quality and consistency you depend on, your rebuild kit is manufactured and assembled in an ISO 9001:2008 certified facility.
• Extend and restore the life of your engine and receive all new parts of a Inframe Rebuild Kit, with no core charge!

Kit Contents:

• (1) Oil Suction Connection Gasket
• (6) .50mm Piston Kits
• (6) .50mm Piston Engines
• (12) Piston Pin Retainers
• (6) .50mm Piston Ring Sets
• (6) .50mm Top Piston Rings
• (6) .50mm Second Piston Rings
• (6) .50mm Oil Piston Rings
• (1) Main Bearing Set
• (1) Thrust Bearing
• (6) Main Bearings
• (7) Main Bearings
• (1) Lower Thrust Bearing
• (6) Connecting Rod Bearings
• (6) Connecting Rod Bearings
• (1) Oil Pan Gasket
• (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