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

Manley Performance is well-known for making strong internal engine components, and these titanium exhaust valves are a prime example of their focus on performance. If you're building a high-performance Big Block General Motors engine, especially one using Dart Pro1 cylinder heads, these valves are designed to help you get the most out of your build. They are specifically made to reduce the weight in your valve train, which is crucial for allowing your engine to rev higher and more reliably.

What really sets these apart is their one-piece forged construction. Unlike some other valves that might be welded, these are forged with a grain flow that makes them inherently more durable and less prone to failure, especially under the stress of high RPMs. Manley uses top-tier titanium alloys that are carefully selected for their strength, hardness, and ductility at the high temperatures found in an exhaust port. Each valve is then precisely machined on advanced CNC equipment to ensure they meet very tight tolerances, which is essential for proper sealing and efficient engine operation. You can choose between conventional square keeper grooves or Manley's Bead Loc single radius grooves.

Because these are titanium and designed for extreme use, Manley requires tip protection to prevent wear. You'll need to use their wear cap, part number 42104 or 42104TM, to protect the end of the valve stem. This kit includes a set of 8 exhaust valves, each with a 1.880-inch head diameter, a 0.3415-inch stem diameter, and an overall length of 5.440 inches. Rigorous quality control is applied throughout the manufacturing process to ensure you're getting a reliable part for your build.