Exhaust Manifold Stud, M8x40, BMW - E21, E30, E28, E34, E24, E23, E32, M10, M20, M30

This part is listed by BMW as BMW part number 07129908134 (07 12 9 908 134) and is described as the M8x40mm stud for the exhaust manifold on M10, M20, and M30 engines used in E21 320i/323i, E30 318i/325e/325i, E28 528e/533i/535i, E34 535i, E24 633CSi/635CSi, E23 733i, and E32 735i models. Sold per stud.

Exhaust studs are a common replacement item - they are easily ruined by rust, oil, and other chemicals. They are easily cross-threaded into the cylinder head or from the copper nut. And the nut and stud often come out together with the nut seized to the threads. It's always a good idea to have some spare exhaust studs on hand for an emergency or plan to replace a complete set any time a manifold is off.

This is a Genuine BMW M8 exhaust stud with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.

For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.