Ferrea - N55/S55 Valve Kit (Intake & Exhaust)

Ferrea Competition Plus Valves are celebrated for their extreme duty performance and industry-leading reliability. Designed specifically for the N55 and S55 motors, these valves are crafted from aerospace-grade alloys like EV8-Z18, delivering superior tensile strength and exceptional durability for high-performance applications.

Ferrea's two-step slow forming process ensures optimal grain flow and minimizes internal stress, providing a rigorous 48-hour heat treatment and stress-relief process, ensuring optimal molecular integrity. Finished with avionics-grade hard chrome plating and featuring a specially hardened tip, these valves are engineered to withstand the extreme demands of performance use.

Upgrade your BMW N55 or S55 engine with the Ferrea Valve Kit for greater strength, improved heat resistance, and outstanding reliability - perfect for both street performance and motorsport builds.

Replaces BMW part #11347847033 & #11347847034

Standard Size is 32mm Intake / 28mm Exhaust

Kit Contains: 

• 12 Intake Valves
• 12 Exhaust Valves