Stock CNC Ported Intake Manifold This is a "CNC PORTED STOCK INTAKE MANIFOLD" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6.This item is sold on a exchange basis ONLY. Customer must ship us their old manifold and if the core is in proper... MSRP: Was: Now: $999.00 Add to Cart