Manley 11378-8 Sport Compact Race Series Stainless Steel Performance Valves

The Manley 11378-8 Race Series valves are precision-engineered stainless steel performance valves designed for sport compact engines. Manufactured from Manley's premium Race Series alloy, these valves deliver exceptional flow characteristics and durability even under extreme operating conditions.

Premium Construction Features:

• Chrome-finished valve stems for superior wear resistance
• Swirl-polished under heads for optimized flow
• Fully hardened valve tips for extended service life
• Completely machined combustion faces for precise sealing
• Closely controlled margin heights for consistent performance
• Exact stem-to-seat concentricity for proper sealing

Pro-Flo Design Technology:

Manley intake valves feature the proprietary Pro-Flo design, which reduces the stem diameter in the critical fillet area. This engineering refinement increases airflow potential while simultaneously reducing valve weight, allowing for higher RPM operation and improved engine response.

Applications:

These Race Series valves are suitable for a wide range of applications, from street performance builds to professional racing engines producing over 1000 horsepower. They're proven in demanding motorsport environments including drag racing, drifting, and high-boost turbocharged applications where exhaust gas temperatures and cylinder pressures reach extreme levels.

Manley's Race Series stainless steel alloy provides the hot hardness and high-temperature strength required for reliable operation in forced induction applications and high-RPM naturally aspirated builds.