Manley 11952B-8 Titanium Intake Valve Set 2.250in Head Big Block GM

Featuring a 2.250-inch head diameter and a +0.350-inch over-stock overall length of 5.600 inches, these valves are purpose-built for high-performance and racing engines that demand reduced valvetrain mass and increased RPM capability.

Key Specifications:

• Head Diameter: 2.250 in.
• Stem Diameter: 0.3415 in. (11/32 in.)
• Overall Length: 5.600 in. (+0.350 in. over stock)
• Keeper Groove: Bead Loc® Single Radius
• Material: Premium Titanium Alloy
• Application: Big Block GM

Key Features:

• One-Piece Forged Construction: Forged from a single piece of titanium with full grain flow — no head-welded-to-stem construction — for maximum structural integrity
• Lightweight Design: Significantly reduces overall valvetrain mass for quicker valve action, increased throttle response, and higher sustainable RPM
• Premium Titanium Alloy: Carefully selected alloy grades deliver an optimal balance of hardness, ductility, and fatigue strength across operating temperatures
• CNC Precision Machined: Machined in state-of-the-art CNC turning centers and valve stem grinders to exacting tolerances
• Micro-Polished Finish: Jewel-like surface finish on the stem and underhead area for smooth operation
• Bead Loc® Keeper Groove: Single-radius groove design for secure keeper retention under aggressive valvetrain loads
• Stringent Quality Control: Each valve undergoes a rigorous final inspection to verify dimensional accuracy and material integrity

Manley strongly recommends that all valve guides be checked and correctly sized to match the listed stem diameter to achieve proper clearances prior to installation. These valves are intended for race and high-performance off-road use.