Manley 11407TB-8 Titanium Exhaust Valves 1.600" Head Diameter +.400" Length

Designed for high-performance and racing applications, these valves are engineered to reduce valvetrain mass, support aggressive camshaft profiles, and withstand the extreme heat demands of exhaust-side duty.

Key Features:

• 1.600" Head Diameter — Precision-sized exhaust valve head for optimal sealing and flow
• +0.400" Extended Length — 0.400 inches longer than stock for use with raised port heads and custom valvetrain geometry
• 0.3415" Stem Diameter — Standard .342" stem for broad compatibility with performance cylinder heads
• Bead Loc® Keeper Groove — Requires Bead Loc® valve locks; eliminates the risk of keeper separation at high RPM
• One-Piece Forged Construction — Forged with grain flow throughout; no welded head-to-stem joint that can become a failure point
• Micro-Polished Finish — Jewel-like surface finish eliminates stress risers and increases fatigue strength
• Premium Titanium Alloy — Engineered for the ideal balance of hardness, ductility, and fatigue strength at elevated exhaust temperatures
• CNC Machined to Exacting Tolerances — Produced on state-of-the-art CNC turning centers and valve stem grinders for consistent, tight-tolerance delivery
• Rigorous Final Inspection — Every valve passes a stringent quality control process before leaving the factory

Installation Note: Manley strongly recommends that all valve guides be measured and correctly sized to match Manley's stem diameter specifications to achieve proper stem-to-guide clearance prior to installation.

Manley titanium valves are the preferred choice for drag racing, road racing, and high-performance street engines where reducing reciprocating valvetrain mass translates directly into higher RPM potential and improved throttle response.