Original BMW Exhaust Manifold Stud M8x40 for BMW 1600, 2002, 2800, 3.0, 3 Series, 5 Series, 6 Series, and 7 Series (1967–1995)

Built for the exhaust side of BMW's M10, M20, and M30 cylinder heads, Original BMW stud bolt 07-12-9-908-134 is the M8x40 stud that locates and clamps the exhaust manifold. It fits BMW cars from the 1600 and 2002 through the E30 3 Series, E34 5 Series, E24 6 Series, and E32 7 Series. Each stud has an 8 mm thread, is 40 mm long, and weighs 12 g. BMW production of this number began in October 1976, and it replaced the earlier number 07-12-9-908-139. It is made in Germany and sold new and unused. A stud stays threaded in the head while the manifold slides over it and a nut clamps it down, so the threads in the head are not worked every time the manifold comes off.

Original BMW Parts carry a 24-month parts warranty.

BMW's parts data shows this stud on a long run of chassis. These include the E21 3 Series with M10 and M20 engines and the E30 316i, 320i, 325e, 325i, and 325ix, including the Cabrio. It also appears on the E12, E28, and E34 5 Series, the E24 6 Series, and the E23 and E32 7 Series, including the E23 745i with the S38 engine. Two motorsport cars use it as well: the E36 318iS Class 2 with the S14 and the 320i STC with the S42. BMW marks the change from 07-12-9-908-139 as not exchangeable retrospectively. Use 07-12-9-908-134 as the current number when matching studs against an older parts order.

Technical Details

• Manufacturer: BMW (Original BMW part)
• Part number: 07-12-9-908-134
• BMW part name: stud bolt, cylinder head to exhaust manifold
• Size: M8x40 (8 mm thread, 40 mm long)
• Weight: 12 g (0.42 oz)
• Production start: October 1976
• Replaces: 07-12-9-908-139
• Made in Germany
• Sold individually
• Warranty: 24 months on Original BMW Parts

Common Questions

Does this replace part 07-12-9-908-139?
Yes. BMW records 07-12-9-908-139 as the old number for this stud.

What size is the stud?
It has an M8 thread and is 40 mm long. Each stud weighs 12 g.

Where does it go on the engine?
It is the cylinder head stud that holds the exhaust manifold.

Classic BMW owners can count on PMB for the small factory hardware that keeps a manifold job moving.

Fitment & Compatibility

Check the table below for the exact year, model, submodel, and any listed notes. PMB Performance has spent over 20 years matching parts to vehicles and can verify this against your VIN.