Designed for high-performance and durability under the most demanding conditions, this Supertech kit includes 12 intake and 12 exhaust valves, perfect for direct installation on standard engine heads. These valves are specifically engineered for S55 engines, which are used in BMW M3 F80, M4 F8x, and..

Designed for high-performance and durability under the most demanding conditions, this Supertech kit includes 12 intake and 12 exhaust valves, perfect for direct installation on standard engine heads. These valves are specifically engineered for S55 engines, which are used in BMW M3 F80, M4 F8x, and..