Elring 804.250 Engine Cylinder Head Bolt Set

Elring Cylinder Head Bolt Set for Audi

Elring 804.250 is an engine cylinder head bolt set built for specific Audi applications that require M11 x 1.5 x 137.5 mm fasteners with a female star bolt head design. It is a direct-fit hardware solution for engine rebuilds and head gasket service on select Audi A4, A4 Quattro, A6, A6 Quattro, Cabriolet, 90, 90 Quattro, 100, and 100 Quattro models.

• Brand: Elring
• Part number: 804.250
• Engine cylinder head bolt set for engine hardware service
• Female star bolt head / nut design
• Thread size: M11 x 1.5 x 137.5
• Spanner size: X - M 10
• Engine fitment matched to select Audi applications

Fitment Details

Compatible with 1992-1994 Audi 100 and 100 Quattro, 1993-1995 Audi 90 and 90 Quattro, 1994-1998 Audi Cabriolet, 1995-1997 Audi A6, 1995-1998 Audi A6 Quattro, 1996-1997 Audi A4, 1996 Audi A4 Quattro, and 1997 Audi A4. Fitment notes for listed applications call out 137.5 mm length, M11 thread size, 1.5 mm thread pitch, and female star bolt head design where specified.

Elring 804.250 also cross-references MAHLE GS33406A for the same application.

What This Part Helps Address

• Worn or stretched cylinder head bolts during head gasket replacement
• Loss of proper clamping force in the cylinder head assembly
• Fastener mismatch during engine rebuild or top-end service
• Incorrect thread size, pitch, or bolt head design for the application
• Repeat head gasket service caused by reusing fatigued hardware

Installation Notes

Verify engine code, bolt length, thread size, and head design before installation. Clean the threaded holes and mating surfaces, then follow the vehicle service manual for tightening sequence and torque procedure. Because cylinder head fasteners are critical engine hardware, confirm the Audi A4, A4 Quattro, A6, A6 Quattro, Cabriolet, 90, 90 Quattro, 100, or 100 Quattro application before assembly.

Quality Assurance

Elring is a recognized engine sealing and hardware brand used in professional repair environments. This part is specified by exact dimensional and design attributes to support accurate fitment on the listed Audi applications.