A pearl white Firebird GTA with a Buick-derived V6 and two turbochargers strapped to it is not the combination anyone expects to see running quarter-mile times that embarrass big-blocks. But Buick spent the 1980s proving that a boosted six could humiliate V8s, and this Firebird is what happens when someone takes that lesson to its logical extreme. Here is why the engine everyone dismissed keeps winning.