Description

Sierra’s 18-4493HP Cylinder Head Assembly is designed for use in GM Vortec Big Block 454/7.4L engines. Key features include: GM Casting 12560241 and 10141279, 100cc combustion chamber, and 246cc intake runner. Each Sierra product meets or exceeds the original equipment part it replaces.
Designed for use in GM Vortec Big Block 454/7.4L engines
Key Features: GM Casting 12560241 and 10141279, 100cc combustion chamber, and 246cc intake runner
Includes one cylinder head assembly
Each Sierra product meets or exceeds the original equipment part it replaces