Manley Titanium Exhaust Valve Kit - Big Block General Motors - Dart Pro1

This kit includes eight Manley Titanium Exhaust Valves, specifically designed for Big Block General Motors engines using Dart Pro1 cylinder heads. These valves are crafted from exceptional titanium alloys, striking a perfect balance between mechanical properties, hardness, ductility, and fatigue strength at high temperatures. The primary advantage of using titanium is significant weight reduction in the valve train, which is crucial for improving engine efficiency and allowing for higher engine speeds. This makes them an excellent choice for applications that regularly operate at high RPMs or require compatibility with aggressive camshaft profiles.

Manley's one-piece forged construction with grain flow ensures superior durability and minimizes potential weak points compared to other manufacturing methods. Each valve is meticulously machined in state-of-the-art CNC turning centers and valve stem grinders, maintaining exacting tolerances for optimal performance. The titanium alloys used are selected for their strength and ability to withstand the demanding conditions of high-performance engines. Each valve undergoes a stringent final inspection process to ensure uncompromising quality and reliability, delivered within tight tolerances.

This set features a 1.880-inch head diameter, a 0.3415-inch stem diameter, and an overall length of 5.440 inches. They come equipped with Manley's Bead Loc? single radius keeper grooves. It's important to note that if your application requires tip protection, Manley wear caps (P/N 42104 or 42104TM) are required, as these valves do not include a hard tip unless specified by a "T" suffix in the part number.