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

If you're building a high-performance Big Block General Motors engine with Dart Pro1 cylinder heads, these Manley Titanium Exhaust Valves are a serious consideration. They're designed to shave significant weight off your valve train, which is crucial for allowing your engine to rev higher and more reliably. When you're pushing an engine hard, especially at extended high-RPMs, reducing reciprocating mass is key to unlocking more power and preventing component failure.

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 spots you might find in welded alternatives. Manley uses exceptional titanium alloys, carefully selected for their balance of hardness, ductility, and fatigue strength at the high temperatures found in an engine. They're then meticulously machined on advanced CNC equipment to exacting tolerances, ensuring they seal perfectly and perform consistently. This attention to detail means you get a valve that's built to last and perform under pressure.

This set includes 8 exhaust valves, each featuring a 1.900-inch head diameter and a 5.440-inch overall length. They come with Manley's Bead Loc groove, which is designed for use with their specific keeper system. It's important to note that these valves do not include a hard tip, so you'll need to use a Manley wear cap, like part number 42104 or 42104TM, for tip protection, especially if you're running aggressive camshafts.