Frankenstein - Cylinder Heads Ported LS1 (Pair)

Frankenstein Engine Dynamics 243/799 - LS1 Ported Heads (SET) Fully CNC ported, Stock LS1 Valves, FED .660” Lift Valve Springs, CNC Valve Job, NO CORE CHARGE! Stage 1 Porting Fully 5-Axis CNC ported, 64cc chamber volume FED’s exclusive high performance porting programs via 5-Axis CNC – Intake/Exhaust/Chambers Pressure Tested for Leak Detection Precision Newen CNC Valve Job, which ensures near zero runout All Cylinder Head Sealing Surfaces Including Ends are PCD Machined, Making Sure all Surfaces are True Meticulous Hand Blending and Deburr PCD Surfacing Optimal For Modern MLS Head Gaskets Final Wash and Assembly Extreme Attention to Detail and Quality Control at Every Stage