Mangum Racing Brodix 273cc LS7 Cylinder Heads
Based on the race-proven Brodix LS7 casting, this Mangum Racing 273cc program is built for large-displacement, high-rpm LS7 combinations. Full CNC machining, a 12° valve angle, OEM LS7 valve spacing, and a 6-bolt deck deliver airflow and structural strength for demanding naturally aspirated or boosted applications.
Key Features
- 6-bolt Brodix LS7 casting with stock valve lengths and OEM LS7 valve spacing
- 273cc CNC intake ports, 93cc exhaust ports, and 70.5cc CNC combustion chambers
- 2.200" titanium intake valves and 1.610" stainless exhaust valves
- Bronze guides, PAC .660" dual springs, titanium retainers, Viton seals, and 1.250" steel spring seats
- Chamber softening and flat milling at .006" per cc available
- Minimum bore: 4.100"
Airflow Performance
SuperFlow 1020 data with a 4.125" bore plate; intake uses a radius entry and exhaust is tested without a pipe.
| Valve Lift | .200 | .300 | .400 | .500 | .600 | .700 |
|---|---|---|---|---|---|---|
| Intake CFM | 160 | 255 | 313 | 355 | 382 | 393 |
| Exhaust CFM | 117 | 160 | 209 | 224 | 235 | 247 |
Installation note: Stock pushrod length works in many combinations, but final length must be verified after camshaft selection and milling.
Processing & Shipping Overview
Processing occurs before shipping.
Most in-stock items typically process within 2–3 business days before shipment or pickup. Expedited shipping options affect transit time after an order ships and do not speed up processing.
Made-to-order, special-order, vendor drop-ship, and freight items require additional processing time before shipping. Any extended lead times will be noted on the product page when applicable.
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