Mangum Racing Brodix LS7 273cc LS7 Cylinder Heads

The Mangum Racing CNC Ported Brodix 273cc LS7 Cylinder Heads are built from the race-proven Brodix LS7 casting for high-RPM, large-displacement LS combinations. Featuring a 12° valve angle, OEM LS7 valve spacing, and stock valve lengths, this 6-bolt cylinder head provides strong airflow while maintaining compatibility with LS7-based combinations.

Each head is CNC machined in-house using Centroid 5-axis machining centers and finished on Newen seat and guide equipment. The 273cc CNC intake runner and 93cc exhaust port are designed for high-output naturally aspirated and boosted applications while retaining a near bolt-on LS7 configuration.

KEY FEATURES

• 6-Bolt Brodix LS7 Casting
• 273cc CNC-Ported Intake Runner
• 93cc Exhaust Port
• 12° Valve Angle with OEM LS7 Valve Spacing
• Stock LS7 Valve Lengths
• 2.200″ Titanium Intake Valves
• 1.610″ Stainless Steel Exhaust Valves
• Bronze Valve Guides
• PAC .660″ Dual Spring Package
• Titanium Retainers
• Viton Valve Seals
• 1.250″ Steel Spring Seats

CYLINDER HEAD SPECIFICATIONS

• Intake Runner Volume: 273cc
• Exhaust Port Volume: 93cc
• Combustion Chamber: 70.5cc CNC Chamber
• Valve Angle: 12°
• Intake Valve: 2.200″ Titanium
• Exhaust Valve: 1.610″ Stainless Steel
• Minimum Bore: 4.100″
• Flat Milling: .006″ per cc
• Combustion chamber softening available
• Chamber milling available at no additional charge

AIRFLOW PERFORMANCE

Flow testing performed on a SuperFlow 1020 with a 4.125″ bore plate. Intake figures were tested with a radius entry and exhaust figures without a pipe.

APPLICATION

With intake airflow reaching 393 CFM at .700″ lift, the Mangum Racing 273cc LS7 cylinder heads are designed for aggressive street/strip combinations, high-RPM naturally aspirated engines, and high-output boosted applications. The cylinder heads are suitable for large-displacement LS7-based combinations, including 427+ cubic-inch builds.

Note: Stock pushrod length works in many applications but must be verified based on camshaft selection, valvetrain geometry, and final cylinder head milling.