The Garrett 403069-0199 is the compressor housing O-ring for the GTP38 turbo on a 1999.5–2003 7.3 Powerstroke. It seals the compressor housing to the backplate. It is not the Y-pipe O-ring.

A cut or missing ring leaks boost inside the housing. That shows up as low boost, high EGTs, and a truck that will not pull. Replace it any time the housing comes off: a Wicked Wheel, a rebuild, or a housing swap. A reused ring rarely seals the second time. This is the genuine Garrett part for the late GTP38.

It fits late-1999.5 through 2003 Super Duty and Excursion 7.3 trucks with the GTP38. Early 1999 trucks use a different turbo.

Fitment

• 1999.5–2003 Ford 7.3L Powerstroke
• F-250, F-350, F-450, F-550, and Excursion
• GTP38 compressor housing to backplate
• Genuine Garrett 403069-0199
• O-ring only
• Does not fit early 1999

This is not Ford F81Z-9E436-AA. That ring seals the Y-pipe to the compressor outlet. This one is inside the housing.