BMW M42 M44 Valve Set

This race-ready BMW M42 M44 Valve Set from Manley Performance is engineered for high-demand builds. Designed with single-groove stems and offered in 6-mm or 7-mm stem diameter, these stainless steel valves accommodate aggressive cams, forced induction, and sustained high-RPM operation.

Crafted from premium stainless steel alloys, the intake valves are polished, swirl-machined and built to exacting tolerances; the exhaust valves are hardened for extreme heat resistance. Each valve features a precision back-cut profile to optimize airflow and maximize volumetric efficiency in tuned cylinder heads. Hardened valve tips and durable stems ensure these valves withstand the high loads, elevated temperatures and severe duty cycles found in drag racing, road racing and high-horsepower turbo builds.

Key Features:

• Single-groove stem design for secure keeper retention
• Stem diameter: 6 or 7 mm
• Intake diameter: 34 mm
• Exhaust diameter: 31.5 mm
• Race-grade stainless steel construction for superior strength and fatigue resistance in high-RPM or boosted applications
• Back-cut under-head design to improve airflow
• Hardened tips and precision finish for reduced wear and improved sealing

Whether you’re building a high-rev E30 or upgrading for forced induction, the Manley Performance Race Stainless Steel Valves provide the reliability and performance that serious engine builders demand.

Professional Installation is strongly recommended. 

BMW M42 M44 Valve SetContents: 

• (8) 34mm Intake Valves
• (8) 31.5mm Exhaust Valves