Hi-Ram Top 1x4 4150 Flange Top P/N 1984, 3984, 1988, & 3988. Weiand Nostalgia series intakes are proudly cast and machined in the USA. Hi-Ram Intake Manifold Top 1x4 4150 Flange Top P/N 1984, 3984, 1988, & 3988 This manifold top is part of the Weiand Nostalgia Series of intake manifolds.
