Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L Inframe Engine Rebuild Kit, New (IF3806271)

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 

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.

• Do you want to restore and extend the life of your engine? 4BTdiesel can help you with that! Enhance the quality and consistency of your rig with a brand new Inframe Rebuild Kit manufactured and assembled in an ISO 9001:2008 certified facility. 
• Want more strength within your engine? You’ll get just that with piston pins hardened and tempered for improved strength and wear resistance to keep your engine going for another million miles.
• OEM gasket materials are used throughout the rebuild kit for leak free durability. Keeping your engine running smoothly until the cows come home.
• Here at 4BTdiesel we want you to get the most for your money. Save some money today and get equal or better quality than the OE at a much lower price.
• Think your tough? Receive connecting rod and main rod bearings made with tri-metal materials for durability. That’s tougher than your average Joe!
• Be confident you’re driving safely with the correct gasket materials to have excellent performance in functionality and sealability. These include sealing products made from 100% asbestos free material that are proudly made in the USA.
• You’ll get back up and running in no time. Be assured your Inframe Rebuild Kit is built to OEM specifications ensuring proper fit and function within your engine.
• Why sacrifice quality if you don’t have to?  Keep oil in it’s place with oil control rings designed with precise tangential tension to give your engine the proper oil control it requires.
• Go the extra mile with CNC turned pistons to precise tolerances and computer controlled piston machining to maintain proper clearances.

Kit Contents:

• (1) Main Bearing
• (6) Connecting Rod Bearings
• (6) Connecting Rod Bearings
• (1) Oil Pan Gasket
• (1) Gasket
• (6) .50mm Piston Kits
• (6) Piston Pins
• (12) Piston Pin Retainers
• (6) .50mm Engine Pistons
• (6) .50mm Piston Ring Sets
• (6) .50mm Top Piston Rings
• (6) .020 Compression Piston Rings
• (6) .020 Oil Piston Rings
• (1) Upper Engine Gasket Set
• (6) Rocker Cover Bolt Seals
• (1) Metal Gasket
• (2) Washers
• (6) Injector Sleeves
• (6) Injector Seals
• (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