Ford 6.0L Powerstroke OE Up-Pipe to Y-Pipe Gasket (3C3Z-6N640-AA)

The genuine Ford 3C3Z-6N640-AA gasket seals the bolted flange where the passenger-side up-pipe meets the Y-pipe on the 6.0L Powerstroke. A worn or blown gasket here leaks exhaust ahead of the turbo, so replace it whenever this joint is opened. It’s sold individually, and one gasket covers the joint.

Key Benefits & Features

• Genuine Ford Part: Ford part number 3C3Z-6N640-AA, listed by Ford as the inlet pipe gasket.
• Seals the Bolted Flange: Fits the bolted connection between the passenger-side up-pipe and the Y-pipe.
• Early and Late 2004: The same gasket fits 2003, early 2004, late 2004 and 2005–2007 trucks.
• What's in the Box: (1) Ford 3C3Z-6N640-AA up-pipe to Y-pipe gasket.

Fitment

• 2003–2007 Ford F-250, F-350 and F-450 / F-550 Super Duty 6.0L Powerstroke Diesel
• 2003–2005 Ford Excursion 6.0L Powerstroke Diesel
• 2004–2010 Ford E-350 Super Duty and 2005–2010 E-450 Super Duty 6.0L Powerstroke Diesel vans
• Part Number: Ford 3C3Z-6N640-AA (interchanges with Mahle F31804)

Tech & Installation Notes

• Replace It Whenever the Joint Comes Apart: Use a new gasket any time the passenger up-pipe is unbolted from the Y-pipe, including turbo service and up-pipe upgrades.
• Clean Both Flanges: Remove carbon and old gasket material from both flange faces so the new gasket seats flat.