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

Manley Performance is well-known for making strong internal engine components, and this Titanium Series exhaust valve kit is a prime example of their focus on high-performance applications. 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 extreme demands you'll put on them. They're built to reduce valve train weight, which is crucial for allowing your engine to rev higher and sustain those high engine speeds without excessive stress on the components.

What sets these valves apart is their one-piece forged construction. This method ensures a solid, durable part with consistent grain flow, avoiding the potential weak points found in head-welded alternatives. Manley uses exceptional titanium alloys, carefully selected for a balance of hardness, ductility, and fatigue strength at the high temperatures these engines generate. They're then meticulously machined on state-of-the-art CNC equipment to exacting tolerances, ensuring they fit and perform precisely as they should. The result is a valve that's not only lightweight but also incredibly durable and reliable, even in extended high-rpm racing scenarios.

This kit includes eight exhaust valves, each measuring 1.840 inches in head diameter, 0.3415 inches in stem diameter, and 6.550 inches in overall length. It's important to note that if your part number doesn't have a 'T' suffix, tip protection is required. Manley offers wear caps (P/N 42104 or 42104TM) for this purpose. These valves are available with conventional square or Manley's Bead Loc single radius keeper grooves, giving you options for your specific build.