Product Description
Frankenstein Monster M712 283cc LS7 12 Degree Cylinder Head Pair
Fits 4.100" and Larger Bore LS Engines when used with a Square Port (LS7) Style Intake Manifold
Currently accepting pre-orders. Expected to ship early February 2025
The Monster Series M712 283cc LS7 Cylinder Heads are engineered for serious performance enthusiasts seeking unmatched power and reliability. Fully CNC-ported and constructed with high-quality components, these heads deliver exceptional airflow and combustion efficiency, making them ideal for street-and-strip builds.
Designed to feed naturally aspirated, boosted, high-RPM stock bottom ends or larger displacement stroker engines, the M712 heads feature a 5-Axis CNC ported intake and exhaust chambers, meticulously hand-blended and deburred for maximum performance. They provide exceptional flow characteristics, with flow testing that sets a benchmark in the industry. For those who demand maximum power from their LS engine, the M712 cylinder heads are the ultimate choice!
Key Features:
• Fully CNC Ported: Featuring a 283cc intake port and 95cc exhaust port, with a 64.5cc combustion chamber volume and 12 degree valve angle, these heads maximize airflow and provide increased power potential for both street and race builds.
• Proven Performance: The 283cc intake port has been flow bench tested to an impressive 395.0 cfm on the intake side and 261.0 cfm on the exhaust side, providing the airflow needed for high-performance builds.
• Perfect for N/A, Boosted, High-Rev & Stroker Builds: Ideal for naturally aspirated, boosted applications, high-RPM stock bottom end builds or larger displacement stroker engines, these heads are engineered to meet the airflow demands of aggressive applications.
• Heavy Duty Construction: Extra-thick deck surfaces are included to alleviate head gasket sealing issues, especially in power-adder applications such as forced induction or nitrous systems
• Premium Components:
- Intake Valves - Stainless Steel Severe Duty Valves
- Exhaust Valves - Stainless Severe Duty Valves
- Bronze Valve Guides
- Lightweight Titanium Retainers
- PAC Custom Dual Valve Springs .700 Lift for Hydraulic Roller
- O-Ringed Exhaust Ports (Hi-Temp Silicone O-rings included)
- 6 Bolt Pattern: Can be used on Aftermarket 6 bolt blocks or Factory 4 bolt blocks
Specifications:
- Minimum Bore Diameter: 4.100”
- Intake Port Volume: 283cc
- Exhaust Port Volume: 95cc
- Combustion Chamber Volume: 64.5cc
- Intake Valves: FED Prime Grade Stainless Steel 2.205”
- Exhaust Valves: FED Prime Grade Stainless Steel 1.600”
- Valve Springs: PAC Dual Springs for Hydraulic Roller
- Retainers: FED Titanium-64
- Valve Locks: GM Valve Locks
- Valve Seals: Viton High Heat Seal
- Exhaust Gaskets: Built-in High Temp Silicone O-Rings
- Rockers: Cast-in Rocker Pedestals Accept OEM Style LS7 Rocker Arms
Note: Our next M712 batch is in production, with an estimated completion in early February. Pre-order now to secure your set!
