Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L Inframe Engine Rebuild Kit, New (IF4956007)

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.

•  To restore and extend the life of your engine, upgrade your rig with a new Inframe Rebuild Kit today!
• We emphasize quality here at 4BTdiesel.  Your brand new kit is manufactured and assembled in an ISO 9001:2008certified facility which ensures quality and consistency you can count on.
• Get back up and running in no time with proper fit and function. All parts are built to OEM specifications to help optimize engine performance. 
• Tired of ridiculous OE prices? Us too. Put the OE to shame with an equal or better quality Inframe Rebuild Kit at a much lower price.
• Want to keep talking savings? We thought so. This item doesn’t include a core charge! All kits consist of all brand new parts, so you can keep some of that jangle in your pocket.
• This Inframe Rebuild kit includes oil rings designed with precise tangential tension for proper oil control, keeping your fluids where they need to be.
• Think you’re tough? The piston pins included are hardened and tempered for improved strength and wear resistance. Now that’s tougher than your average Joe.
• No need to worry about leakage. OEM gasket materials are used throughout for leak free durability.
• Ensure ultimate performance in functionality and sealibility inside your engine withgaskets made of correct materials.
• Go the extra mile, or a million extra miles with computer controlled piston machining to maintain proper clearances.
• Have peace of mind knowing sealing products are proudly USA made and 100% asbestos-free material.
• To top it off, 4BTdiesel knows you want durability within the engine. With tri-metal connecting rods and main bearings to give your engine a backbone, you’ll get just that.

Kit Contents:

• (1) Oil Suction Connection Gasket
• (6) .50mm Piston Kits
• (12) Piston Pin Retainers
• (6) Piston Pins
• (6) .50mm Engine Pistons
• (6) .50mm Piston Ring Sets
• (6) .50mm Top Piston Rings
• (6) .50mm 2nd Piston Rings
• (6) .50mm Oil Piston Rings
• (1) Main Bearing Set
• (1) Thrust Bearings
• (6) Main Bearings
• (7) Main Bearings
• (6) Connecting Rod Bearings
• (6) Connecting Rod Bearings
• (1) Oil Pan Gasket
• (1) Upper Gasket Set
• (1) O-Ring Seal
• (1) Seal
• (6) Injector Seals
• (1) Coolant O-Ring Seal
• (2) O-Ring Seals
• (1) O-Ring Seal
• (2) Rectangular Ring Seals
• (1) Cover Plate Gasket
• (1) Intake Manifold Cover Gasket
• (2) Connection Gaskets
• (1) Rocker Cover Gasket
• (1) O-Ring Seal
• (1) Thermostat Seal
• (24) Valve Stem Seals
• (1) Rocker Cover Housing Gasket
• (12) Sealing Washers
• (1) Sealing Washer
• (1) Sealing Washer
• (14) Sealing Washers
• (1) O-Ring Seal
• (1) Connection Gasket
• (4) EGR Valve Gaskets
• (1) O-Ring Seal
• (1) Accessory Drive Cover Gasket
• (1) Valve Cover Gasket
• (1) Cylinder Head Gasket
• (1) EGR Transfer Tube Gasket
• (6) O-Ring Seals
• (1) Oil Drain Gasket
• (6) Exhaust Manifold Gaskets
• (3) O-Ring Seals
• (1) O-Ring Seal
• (1) O-Ring Seal
• (1) O-Ring Seal
• (1) Seal
• (2) Seals

Warranty

6-month warranty.

What Rebuild Kit and Gasket Set Includes