The Buick GNX is iconic — one of the great modern GM performance cars. The ultimate Grand National, it was limited to 547 units and received a host of changes at the hands of ASC McLaren over the “regular” car. These included substantial upgrades underhood, most notably to the turbocharger and intercooler, and when it bowed, the GNX was advertised as having 275 horsepower and 360 lb-ft of torque. Another set of numbers, namely the car’s sub-5-second 0-60 time, was evidence that the factory power rating was clearly on the low side. Continue reading eBay Find of the Day: 1987 Buick GNX #359 – 9.9 miles on the odo