Pontiac Bonneville Tarmac Sports Oem Fog Light onally available was the four-barrel version of the 455 rated at 325 gross horsepower in 1971 and 250 net horsepower in 1972. (the on-paper power ratings of both years reflect the changes in power measurement between those two years as was common throughout the auto industry at the time). The year 1971 was also the first for Pontiac and other GM divisions to reduce compression ratios on all engines across the board in order to enable use of lower-octane regular leaded, low-lead or unleaded gasoline thanks to a corporate edict in preparation for the introduction of catalytic converters in 1975

Tarmac Sports Oem Fog Light From 1971 to 1975, the Bonneville was de-emphasized somewhat as Pontiac used the Grand Ville name for its highest-price model. During these years, the Bonneville dropped to mid-line status (replacing the Executive) between the lower-priced Catalina and the Grand Ville. During these years, the Bonneville was offered in three bodystyles including the pillared four-door sedan, four-door hardtop sedan and two-door hardtop coupe. The standard engine for 1971-72 was a 455 cubic-inch V8 with two-barrel carburetor that was rated at 280 gross horsepower for 1971 and 185 net horsepower for 1972 and opti