2005 GTO

The 2005 GTO received standard hood scoops, split rear exhaust, and late in the year, optional 18 inch wheels. The major change for 2005 was the replacement of the LS1 engine with the LS2 engine. This 5,967 cc (364.1 cu in) motor increased power and torque in the GTO to 400 hp with 400 lb·ft torque. With this improved powerplant, Pontiac claimed the car capable of 0 to 60 mph in 4.6 seconds and a 13.0 second quarter mile at 108 mph (automatic transmission). Car and Driver magazine tested the car at 4.8 seconds 0-60 mph and 13.3 seconds at 107 mph for the quarter mile, so the claims seem justified. Dashboard gauge graphics were also revised. The optional dealer installed Sport Appearance Package became available and differed visually by having a different lower rear fascia that sported quad chrome exhaust tips, louder aggressive sounding mufflers, a modified spoiler, a modified front lower fascia extension, recessed SAP Grilles, and modified rocker panels. This package was available from GM as an accessory in red, silver, black, or primer for other color cars. Nonetheless, production was scaled back to 11,069, primarily because of a shortened model year. Barbados Blue and Cosmos Purple were dropped this year, but Cyclone Grey and Midnight Blue Metallic were added. On a side note, customers had the option to order their GTO without hood scoops, though only 24 were produced this way.