6-Bolt Cathedral Port Cylinder Heads

The Frankenstein M115 6-Bolt Cathedral Port Cylinder Head Set represents a significant upgrade for LS1, LS2, and LS6 engines, offering performance beyond OEM capabilities. These heads are fully 5-axis CNC ported with Frankenstein Engine Dynamics' latest high-performance program, meticulously hand-blended and deburred to ensure optimal airflow and precise tolerances. Key specifications include a 3.780″ minimum bore, 64cc chamber volume, and either 225cc or 240cc intake port volume with a 96cc exhaust port volume. The valve angle is set at 15°, and the deck thickness is 0.625″. It's important to note that the chamber width requires a minimum 4.030 bore gasket. Additionally, 1/2" head studs are not available for these heads. All cylinder heads are built to order, with current lead times approximately 4-6 weeks for completion. The Monster Series, to which the M115 belongs, is engineered to provide a substantial increase in horsepower, suitable for builds aiming for performance far beyond stock specifications. The strict quality control processes employed by FED ensure that each head meets exacting standards for reliability and performance.