The Buick Grand National has long held a special status ... This restomod, named Invadr, packs a twin-turbo 3.8-liter V6 built by Duttweiler Performance, generating a mind-bending 1,246 horsepower ...
Arriving in 1987, the GNX took the Buick Regal—which was already offered in go-fast Grand National form—and turned up the ...