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Nitrous/injector bosses
it has a square bore carb flange instead of a spread bore
Speedmaster CNC ported cylinder heads are machined on dedicated 5-axis CNC machines to ensure accuracy and better flow
It is set up to accept a spread bore carb but comes with an adapter plate that permits the use of square bore carbs
Chevy BBC 454 Head Build Kit - Mechanical Flat Tappet Nitrous/injector bossesSpeedmaster cylinder head valvetrain kits offer a comprehensive solution for revitalizing your engine's cylinder heads. These kits are expertly crafted to restore optimal performance and are tailored to match specific cylinder head configurations and camshaft profiles, ensuring a perfect fit and maximum efficiency. Whether you're overhauling an engine or looking to upgrade your vehicle's performance, these valvetrain kits provide all the necessary
