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

Manley Performance has built a reputation for making well-built internal engine components, and their Titanium Series exhaust valves are a prime example of that commitment. If you're building a serious Chevrolet Big Block engine, especially one destined for Pontiac Pro Stock or Dart Big Chief cylinder heads, these valves are designed to handle the demands of high-rpm operation. They significantly reduce valve train weight, which is crucial for allowing your engine to rev higher and more freely, especially when paired with aggressive camshaft profiles.

What sets these valves apart is their one-piece forged construction. This method ensures a strong, durable part with consistent grain flow, avoiding the potential weak points found in head-welded alternatives. Manley uses exceptional titanium alloys, carefully selected for their balance of hardness, ductility, and fatigue strength at high temperatures. Each valve is then meticulously machined on advanced CNC equipment to exacting tolerances, ensuring they fit and perform precisely as they should. This attention to detail means you get a reliable component that can withstand the rigors of extended high-rpm use.

This kit includes eight exhaust valves, each featuring a 1.900-inch head diameter and a 0.3415-inch stem diameter, with an overall length of 6.490 inches. They come with Manley's Bead Loc groove, designed for secure keeper engagement. Remember, for tip protection, Manley recommends their wear cap P/N 42104 or 42104TM.