Description Actual part may differ from image above. S55 engines contain24 valves – 12 intake and 12 exhaust this Set contains 12 STD intakevalves.

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 4.45mm – Stem Diameter 4.97mm.

– Valve Length 104.9mm – Valve Head Size Standard – Valve Head Diameter 32mm – Valve Type Intake – Valve Stem Diameter 4.97mm – Valve Material Stainless Steel Replaces OEM Part # 11-34-7-847-034 / 11 34 7 847 034 / 11347847034.