Product Description
Mangum Racing CNC Ported 243/799 GM Cylinder Heads
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.
