Frankenstein M311 273cc LS3 Cylinder Head Set with Billet Rocker Arm Stands - 11 Degree Valve Angle, Fully CNC Ported - Fits LS3 LSA L99 L76 L77 L92 LY6 L96 - Performance Engines
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Features
- Fully CNC Ported for Maximum Airflow: Features 273cc intake and 112cc exhaust ports, meticulously 5-axis CNC machined, hand-blended, and deburred for peak performance.
- Optimized Combustion Efficiency: 11 valve angle and 68cc combustion chambers enhance airflow dynamics, delivering superior horsepower and torque gains.
- Premium Valvetrain Components: Equipped with black nitride stainless steel severe-duty valves, custom PAC .700 lift dual valve springs, and lightweight titanium retainers for high-RPM stability.
- Enhanced Durability Features: O-ringed exhaust ports with included hi-temp silicone O-rings ensure reliable sealing under extreme conditions.
- Direct Fit for LS3 Applications: Compatible with standard LS3 valvetrain components, including OEM rocker arms, valve covers, and intake manifolds.
Description
Elevate your LS3 engine's performance with the Frankenstein M311 273cc LS3 Cylinder Head Set, complete with billet aluminum rocker arm stands. These heads are meticulously engineered with fully CNC-ported 273cc intake and 112cc exhaust ports, optimizing airflow for both naturally aspirated and forced induction applications. The 11° valve angle, combined with 2.165" intake and 1.600" exhaust valves, enhances combustion efficiency and power output. The robust 0.750" deck thickness and 68cc combustion chambers provide the durability needed for high-performance builds. The included billet aluminum rocker arm stands are designed for LS3-style rocker arms, offering improved valvetrain stability and compatibility. Whether you're building a street machine or a track-ready racer, this cylinder head set delivers the performance and reliability demanded by enthusiasts and professionals alike.
Manufacturer: Frankenstein Engine Dynamics
Brand: Michigan Motorsports
Model: Boost Monster M311 Cylinder Heads with Billet Stands
Country of Origin: USA
Item model number: MM113004-Pair+Stands
Exterior: Machined
Manufacturer Part Number: MM113004-Pair+Stands
Date First Available: May 6, 2025
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