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Sierra International Cylinder Head Assembly For Gm Vortec Bb 454/7.4L 18-4493HP
Sierra International Cylinder Head Assembly For Gm Vortec Bb 454/7.4L 18-4493HP. 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...
$1,005.25 Free Delivery
