Mangum Racing 273cc LS7 Cylinder Heads
MANGUM RACING
SKU #MR-273LS7
$3,299.99
Was
$3,299.99
Was
Was
The Mangum Racing CNC Ported 273cc LS7 Cylinder Heads are designed for high-performance LS7 combinations requiring increased airflow, durability, and consistent valvetrain performance. Built around a 12° valve angle and OEM LS7 geometry, these 6-bolt cylinder heads maintain factory-style intake and exhaust port locations while providing substantially increased airflow capability.
SKU
MR-273LS7
Qty
The Mangum Racing CNC Ported 273cc LS7 Cylinder Heads are designed for high-performance LS7 combinations requiring increased airflow, durability, and consistent valvetrain performance. Built around a 12° valve angle and OEM LS7 geometry, these 6-bolt cylinder heads maintain factory-style intake and exhaust port locations while providing substantially increased airflow capability.
A fully CNC-ported 273cc intake runner and optimized 93cc exhaust port provide strong mid-lift and high-lift airflow for aggressive naturally aspirated and forced-induction LS7 combinations.
KEY FEATURES
- 6-Bolt LS7 Cylinder Head Casting
- 273cc CNC-Ported Intake Runners
- 93cc Exhaust Ports
- 12° Valve Angle
- OEM LS7 Valve Spacing
- Stock Intake and Exhaust Port Locations
- 2.200" Titanium Intake Valves
- 1.610" Stainless Steel Exhaust Valves
- Bronze Valve Guides
- PAC .660" Dual Valve Springs
- Titanium Retainers
- Viton Valve Seals
- 1.250" Steel Spring Seats
- Center-Bolt Valve Cover Pattern
CYLINDER HEAD SPECIFICATIONS
- Intake Runner Volume: 273cc
- Exhaust Port Volume: 93cc
- Combustion Chamber: 70.5cc
- Valve Angle: 12°
- Intake Valve: 2.200" Titanium
- Exhaust Valve: 1.610" Stainless Steel
- Minimum Bore Size: 4.100"
- Flat Milling: .006" per cc
- Head Bolt Configuration: 6-Bolt, OE or LS Bolt Compatible
- Milling available at no additional charge
AIRFLOW PERFORMANCE
Flow testing was performed on a SuperFlow SF-1020 with a 4.125" bore plate. Intake figures were tested with a radius entry and exhaust figures without a pipe.
| VALVE LIFT | INTAKE CFM | EXHAUST CFM |
|---|---|---|
| .200" | 160 | 117 |
| .300" | 255 | 160 |
| .400" | 313 | 209 |
| .500" | 355 | 224 |
| .600" | 382 | 235 |
| .700" | 393 | 247 |
HIGH-PERFORMANCE LS7 APPLICATIONS
With intake airflow reaching 393 CFM at .700" lift, the Mangum Racing 273cc LS7 cylinder heads are suited for aggressive street and strip combinations, including high-RPM naturally aspirated engines and high-output forced-induction applications.
Note: Pushrod length can vary based on camshaft selection, valvetrain components, and cylinder head milling. Proper pushrod length should always be measured and verified during installation.
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