Ferrea Competition Plus Exhaust Valve Kit 31.5mm +1mm - BMW / M50 / M51 / M52 / M54 / S50

Description Actual part may differ from image above. M50-M54 & S50 engines contain24 valves – 12 intake and 12 exhaust this Set contains12 +1mm oversized exhaust valves.

Ferrea Competition Plus Valves have built a reputation as the industry’s most reliable extreme duty valve. To manufacture the valves we use special aerospace quality alloys, including the EV8-Z18, which provides high tensile strength. An exclusive two-step slow forging process ensures proper grain flow and virtually eliminates any damage to the material structure. The valves are then heat-treated and stress-relieved over a 48-hour period, which is the crucial base of our molecular integrity. These valves feature avionics-quality hard chrome along with a specially applied hard tip. – Valve Tip Length 3.7mm – Stem Diameter 5.96mm.

– Valve Length 106mm – Valve Head Size 0.040″ / 1mm – Valve Head Diameter 31.5mm – Valve Type Exhaust – Valve Stem Diameter 5.96mm – Valve Material Stainless Steel, Super Alloy – Valve Face Dish Replaces OEM Part # 11-34-1-739-823 / 11 34 1 739 823 / 11341739823.