The Grand National and GNX were among the fastest cars in the 80's. They were actually faster than the Chevy Corvette built during the same model years. GM is adding the Grand National and GNX back to the Buick lineup. Looks like the demand for speed can be filled again with a RWD Buick.
http://reviewcars2014.com/2015-buick-grand-national-gnx/
http://reviewcars2014.com/2015-buick-grand-national-gnx/