Manley 11926H-8 Titanium Hollow Stem Intake Valve Set 2.470 in. Pontiac

The hollow stem design provides additional weight savings over a solid stem valve, further reducing valvetrain mass and enabling higher RPM capability.

Key Specifications:

• Head Diameter: 2.470 in.
• Stem Diameter: 0.3415 in.
• Construction: Hollow stem titanium
• Keeper Groove: Bead Loc® groove

Key Features:

• One-Piece Forged Construction: Forged from a single titanium billet with continuous grain flow — not a head welded to a stem — eliminating potential weak points and maximizing long-term durability
• Premium Titanium Alloy: Manufactured from select titanium alloys that deliver the optimal balance of hardness, ductility, and fatigue strength under extreme combustion temperatures
• CNC-Precision Machined: Machined in state-of-the-art CNC turning centers and valve stem grinders to maintain exacting tolerances for consistent sealing and performance
• High-RPM Optimized: Lightweight hollow stem design significantly reduces reciprocating valvetrain mass, enabling higher sustained RPM and compatibility with aggressive camshaft profiles
• Rigorous Quality Control: Every valve undergoes a stringent final inspection process to ensure uncompromising precision and reliability in the most demanding racing conditions
• Tip Protection Required: Part numbers with an "H" suffix do not include a hard tip insert — use Manley wear cap P/N 42104 or 42104TM

These valves are the preferred choice of professional engine builders and performance enthusiasts competing in drag racing, road racing, and serious high-performance street applications. Manley Performance has been a trusted name in precision engine components since 1966.