Holley kit for 390,450, & 600CFM Carburettors inside Needles. USA Sourced Kit For Holley 390, 450, & 600 CFM Carburettors. This Rebuilding kit fits Holley 390, 450, & 600 CFM Carburettors. For Holley Carburettors with inside Needle & Seat Type Fuel Bowls.
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