Mangum Racing 243/799 CNC Ported Cylinder Heads for Cathedral Port LS

Fits Cathedral Port 4.8L 5.3L 5.7L 6.0L LS Based Engines

The Mangum Racing Stage 1 Ported 243/799 Cylinder Heads are designed to transform proven GM factory castings into a reliable, high-performance upgrade. Starting with carefully selected seasoned cores, each set features CNC ported runners and a precision valve job for consistent airflow and long-term durability. These heads retain the factory valves, chamber and guides to keep costs low, while still dramatically increasing performance with over 310cfm of airflow. 

Features:

• Seasoned GM 243/799 Castings
• CNC Ported Intake and Exhaust Runners
• Precision CNC Valve Job
• 228cc Intake Ports
• 62.5cc Combustion Chamers
• 2.00"/1.55" Stock GM Valves
• PAC Racing .660" Dual Valve Springs with Titanium Retainers
• Factory Powdered Metal Guides
• Fully Assembed, Ready to Run
• Miniumum Bore 3.780"
• Priced/Sold as a Pair (no core charge)
• May come as 243 or 799 cores depending on inventory. These two cores perform identically to each other.