Designed for 351W-based competition engines, these Victor 5.8L EFI manifolds are capable of supporting over 700 HP. Engineered for engine displacements of up to 427 cu. , they feature Edelbrock's race-winning air-gap design, which isolates the intake charge from the engine heat that is present in the lifter valley. For maximum airflow and performance, these 5.8L EFI manifolds can't be beat.