General description The Vanos unit is designed to vary the timing of the engine's exhaust and intake valves to improve engine performance. This durable repair kit is suitable for BMW M54, M52, and M56 6-cylinder engines, providing a long-term solution to restore performance to its original condition. Technical specifications Color: Silver Material: Metal Package Contents: 2 Seal Repair Rings Measurement allowed error: +/- 1-3 cm Installation Can be installed by any competent mechanic or DIYer. No special tools are required, other than your fuel pump pulley tool. Cam locking tool is not required. Usage The long-term solution is to use the "Vanos seal kit" to replace the o-rings with the provided o-rings. This, along with the custom-designed PTFE rings, ensures that your engine's performance is restored and will last throughout the engine's life.