BMW M8 G15 copper exhaust centre collar nut 18307597650

Exact-fit copper centre collar nut for BMW M8 (G15) exhaust joints - also fits F10, F80, F87 and G-series M cars where specified. Not a generic substitute: this is the genuine part number 18307597650, made in Germany with high-purity copper for thermal stability and consistent clamp load.

Use it when refreshing catalytic converter mounts, downpipe-to-midpipe connections or any centre-exhaust flange joint that demands OEM-spec copper sealing and torque retention.

• Prevents exhaust leaks, rattles and seized joints
• M8 thread, correct OD and hardness for factory torque specs
• No fitment guesswork - verified for listed chassis only