The Stage 1 455ci V8 had a more aggressive camshaft and higher compression than the standard engine and was rated at 360 horsepower and 510 lb-ft of torque when new. An oil change was performed in preparation for sale. Power is sent to the rear wheels through a three-speed Turbo Hydra-matic automatic transmission and a limited-slip rear differential with 3.42 gears. The transmission weeps fluid at the selector shaft seal.
A 69-page hardcover book details the 2002-2008 build as well as preparation for the 2021 Buick GS Nationals judging. A partial build sheet, manufacturer’s literature, a car cover, GSX Historic Society documents, a GSX-branded flag and wall clock, service manuals, and spare parts are also included in the sale.
The cabin was reupholstered in the factory black vinyl and features textured seat inserts, woodgrain trim, and GSX interior badges. Amenities include air conditioning, power windows, a Sonomatic AM radio, a rear speaker, Buick-branded rubber floormats, and lap seatbelts. The air conditioning system was serviced and recharged with R12 refrigerant in September 2024.
The three-spoke steering wheel is mounted to a tilting column and frames a 120-mph speedometer flanked by a Rallye clock and a combination gauge monitoring fuel level, oil pressure, and engine temperature.
The speedometer assembly was replaced during the restoration and the five-digit odometer shows 106 miles, TMU.
