Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L Inframe Engine Rebuild Kit, Standard, New (IF4089461)

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.

• This rebuild kit is built to strict OEM specifications. Stricter than a dad with his daughter’s boyfriend!
• You will receive all new partsmanufactured and assembled in an ISO 9001:2008 certified facility ensuring proper fitment and function. Plus, with all new parts, there’s no core charge. Giving you more money in your pocket!
• You will receive equal or better quality than the OE at a much lower price. You can’t beat that!
• When you purchase a rebuild kit from 4BTdiesel you are restoring your engine to good working condition, extending the life of your rig for the next generation to take over the family business.
• Beef up your engine with pistons CNC turned to precise tolerances. These will give you the consistency necessary for a good working engine.
• Make your engine tough as nails with connecting rod and main bearings crafted with tri-metal for durability. That’s impressive!
• Ever hear of the little engine that could? He is still running thanks to these piston pins hardened and tempered for improved strength and wear resistance.
• Let’s seal the deal, these gaskets use the correct materials, giving you excellent performance in functionality and sealability, keeping your fluids where they’re supposed to be.
• The sealing products in this kit are proudly made in the USA, using 100% asbestos-free material. I think this speaks for itself.

Kit Contents:

• (6) Piston Kits
• (12) Piston Pin Retainers
• (6) Piston Pins
• (6) Engine Pistons
• (6) Piston Ring Set
• (6) Compression Piston Rings
• (6) Compression Piston Rings
• (6) Oil Piston Rings
• (1) Main Bearings
• (6) Connecting Rod Bearings
• (6) Connecting Rod Bearings
• (1) Oil Pan Gasket
• (1) Gasket
• (1) Upper Engine Gasket Set
• (6) Rocker Cover Bolt Seals
• (1) Metal Gasket
• (2) Washers
• (6) Injector Sleeves
• (1) Thermostat Seal
• (6) Injector Seals
• (6) Valve Cover Gaskets
• (6) Noise Isolators
• (1) Rectangular Ring Seal
• (1) Cylinder Head Gauge
• (6) Mid Range XPI Injector Seals
• (1) Turbo Oil Drain Gasket
• (1) Intake Manifold Gasket
• (2) Gaskets
• (2) Sealing Washers
• (6) Exhaust Manifold Gaskets
• (12) Valve Stem Seals
• (1) O-Ring Seal
• (1) Cylinder Head Gasket
• (6) Washers
• (1) Gasket
• (1) Sealing Washer
• (6) Banjo Seals
• (1) Rectangular Ring Seal
• (1) Washer

Warranty

6-month warranty.

What Rebuild Kit and Gasket Set Includes