Original BMW Exhaust Manifold Stud M7x42 for BMW 3 Series, 5 Series, M3, and Z3 (1992–2000)

Exhaust manifold stud 11-12-1-744-057 is an Original BMW M7x42 stud bolt that threads into the cylinder head and carries the exhaust manifold on M44, M50, M52, S50, and S52 engines in the 1992–2000 BMW 3 Series, 5 Series, M3, and Z3. BMW names it Stud bolt, M7X42, for a 7 mm thread and 42 mm overall length. Each stud weighs 9 grams. BMW has produced this number since September 1994, and it is made in Germany. It is sold individually.

Original BMW Parts carry a 24-month parts warranty.

A manifold stud stays in the head while the manifold slides over it and is clamped down with nuts, so the head threads are not disturbed each time the manifold comes off. These studs live through constant heat cycling, and they should be replaced whenever they are removed and whenever a new exhaust manifold goes on. One part number covers four-cylinder M44 cars, the M50 and M52 sixes, and the S50 and S52 engines in the M3 and Z3 M models, so a single stud size serves the whole group.

Technical Details

• Manufacturer: BMW (genuine part)
• Part number: 11-12-1-744-057
• BMW name: Stud bolt, M7X42
• Position: cylinder head, exhaust manifold mounting
• Weight: 9 g (0.32 oz)
• Production start: September 1994
• Made in Germany, sold individually
• Warranty: 24 months on Original BMW Parts

Common Questions

Can I reuse my old exhaust studs?
They should be replaced whenever removed because of the heat cycling they go through.

Does one size fit both the four-cylinder and six-cylinder engines?
Yes. BMW uses this M7x42 stud on the M44, M50, M52, S50, and S52 engines covered here.

Fitment & Compatibility

Use the table below to verify the year and submodel for your build. Send your VIN and PMB Performance will confirm the fit, drawing on more than 20 years in the trade.