Manley Titanium Series Chevrolet Big Block Exhaust Valve Kit - Pontiac Pro Stock - Dart Big Chief

Starting with a one-piece forged construction that incorporates grain flow, these Manley titanium exhaust valves are built for serious performance. This design choice helps ensure durability and minimizes potential weak points, which is crucial when you're pushing an engine to its limits. They are specifically crafted for high-rpm applications, allowing your engine to safely reach higher speeds and work with aggressive camshaft profiles. The titanium alloy used strikes a balance between hardness, ductility, and fatigue strength, making them well-suited for the demanding temperatures and stresses inside a high-performance engine.

Each valve is meticulously machined using advanced CNC turning centers and valve stem grinders to maintain very precise tolerances. This attention to detail ensures optimal valve performance and reliability. Manley Performance Products puts these valves through a rigorous final inspection process to guarantee uncompromising quality. The set includes 8 exhaust valves, each with a 1.900-inch head diameter and a 0.3415-inch stem diameter, and an overall length of 6.450 inches. They feature Manley's Bead Loc groove for keeper retention.

For installation, it's important to note that tip protection is required. You'll need Manley wear caps, part number 42104 or 42104TM, to protect the valve tips during operation. These valves are designed for specialized engine builds, often found in Pontiac Pro Stock or Dart Big Chief cylinder head applications.