This is a "MAF TRANSLATOR BOX " for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. The Buick translator will allow the user to upgrade to the much better late model GM MAF sensor and replace the now discontinued factory unit. More flow better spool up and complete control over the fuel curve will be a nice upgrade from stock Current version 6.21.
