GM redesigned its A-body line for 1968, with more curvaceous, "fastback" styling. The previous 115 inch wheelbase was shortened to 112 inches for all two-door models. Overall length was reduced 5.9 inches and height dropped half an inch, but overall weight was up about 75 pounds. Pontiac abandoned the familiar stacked headlights for hidden headlights behind the split grille (actually a $52.66 option, but seen on many GTOs). The signature hood scoop was replaced by dual scoops on either side of a prominent hood bulge extending rearward from the protruding nose.
A unique feature was the body-color Endura front bumper. It was designed to absorb impact without permanent deformation at low speeds. Pontiac touted this feature heavily in advertising, showing hammering at the bumper to no discernible effect. Though a rare option, a GTO could be ordered with "Endura Delete", in which case the Endura bumper would be replaced by a chrome front bumper and grille from the Pontiac Le Mans. This model year further emphasized the curvacious "coke bottle" styling, as viewed from the side.
Powertrain options remained substantially the same as in 1967, but the standard GTO engine's power rating rose to 350 hp at 5,000 rpm. At mid-year, a new Ram Air package, known as Ram Air II, became available. It included freer-breathing cylinder heads, round port exhaust and the 041 cam. 'Official' power rating was not changed, although actual output was likely much higher. Another carry-over from 1967 was the 4-piston caliper disc brake option. While most 1968 models had drum brakes all around, this rare option provided greater stopping power and could be found on other GM A-Body vehicles of the same period. 1968 was also the last year the GTOs offered separate vent, or "wing", windows—and the only year for crank-operated vent windows.
Another feature was concealed windshield wipers, hidden below the rear edge of the hood. They presented a cleaner appearance and were a North American first, following British Leyland's earlier debut on Austin and Triumph models. Another popular option, actually introduced during the 1967 model year, was a hood-mounted tachometer, located in front of the windshield and lighted for visibility at night. An in-dash tachometer was also available, but the hood tachometer became something of a status symbol.
Redline bias-ply tires continued as standard equipment on the 1968 GTO, though they could be replaced by whitewall tires at no extra cost. A new option was radial tires for improved ride and handling. However, very few were delivered with the radial tires because of manufacturing problems encountered by supplier B.F. Goodrich. The radial tire option was discontinued after 1968. Pontiac did not offer radial tires as a factory option on the GTO again until the 1974 model.
Hot Rod tested a four-speed standard GTO and obtained a quarter mile reading of 14.7 seconds at 97 mph in pure stock form. Motor Trend clocked a four-speed Ram Air with 4.33 rear differential at 14.45 seconds at 98.2 mph and a standard GTO with Turbo-Hydramatic and 3.23 gears at 15.93 seconds at 88.3 mph. Testers were split about handling, with Hot Rod calling it "the best-balanced car [Pontiac] ever built," but Car Life chiding its excessive nose heaviness, understeer, and inadequate damping.
Like all 1968 passenger vehicles sold in the United States, GTOs now featured front outboard should belts (cars built after January 1, 1968) and side marker lights.
Now facing serious competition both within GM and from Ford, Dodge, and Plymouth—particularly the low-cost Plymouth Road Runner—the GTO won Motor Trend's Car of the Year award, and sales remained strong at 87,684 (which would ultimately prove to be the second-best sales year for the GTO).
