Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L Inframe Engine Rebuild Kit, New (IF4089186)

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.

• You’ll receive a brand new rebuild kit that goes through a strict manufacturing and assembling process in an ISO 9001:2008 certified facility. This ensures excellent quality and consistency.
• If you want increase the longevity and bring your engine to top-notchworking condition, this is the rebuild kit for you. Plus, you’ll get rod and main bearings built with tri-metal material to ensure long lasting strength and durability.
• Think you’re tough? These piston pins sure are. They are hardened and tempered for improved strength and wear resistance. Extreme conditions? Not an issue for these bad boys. 
• Let’s talk sealing products. The products you will get are proudly USA
  made and use 100% Asbestos-Free Material. If that doesn’t get you excited, the correct materials are used for optimal sealing performance.
• It is important to keep your engine well oiled, but who would want leakage? The oil control rings included are designed with precise tangential
  tension for proper oil control. You can’t beat it!
• The pistons included are CNC turned to precise tolerances and computer control machined to maintain proper clearances. Adding onto that,pistons utilize complex combustion bowl geometry for maximum power and efficiency. 
• Rebuilding an engine is a lengthy process. The time spent installing this rebuild kit will be decreased because kit
  components are packed in subassemblies by function. Also, the parts will fit and function properly due to rigorousOE specifications being met.
• Want to save some coin? We’ve got you covered.Quality meets or exceeds the OE’s at a fraction of the cost. To top it off, all new parts are included and there is no core charge. That’s more cash in your pocket!

Kit Contents

• (6) Connecting Rod Bearings
• (1) Main Bearing
• (6) Connecting Rod Bearings
• (1) Flange Gasket
• (1) Oil Pan Gasket
• (6) 1.00mm Piston Kits
• (12) Piston Pin Retainers
• (6) Piston Pins
• (6) 1.00mm Engine Pistons
• (6) 1.00mm Piston Ring Sets
• (6) Top Piston Rings
• (6) 1.00mm Second Piston Rings
• (6) 1.00mm Oil Rings
• (1) Upper Gasket Set
• (1) Breather Mounting Seal
• (3) Sealing Washers
• (6) Gaskets
• (1) Intake Manifold Cover Gasket
• (6) O-Ring Seals
• (2) Gaskets
• (1) Oil Drain Gasket
• (1) Turbocharger Gasket
• (1) Rocker Cover Gasket
• (1) Thermostat Seal
• (1) Rocker Cover Housing Gasket
• (6) O-Ring Seals
• (12) Valve Stem Seals
• (12) Valve Stem Seals
• (2) Lock Plates
• (6) O-Ring Seals
• (1) Cylinder Head Gasket
• (1) Cylinder Head Gasket
• (1) O-Ring Seal
• (2) O-Ring Seals
• (1) O-Ring Seal
• (2) Turbo Hose O-Ring Seal
• (1) O-Ring Seal
• (11) Sealing Washers
• (6) Mid Range XPI Injector Seals
• (6) Exhaust Manifold Gaskets

Warranty

6-month warranty.

What Rebuild Kit and Gasket Set Includes