1999 marked the 30th Anniversary of the Trans Am since it's release in 1969, and Pontiac commemorated this event by creating another white Anniversary Edition Trans Am. This commemorative package came with twin blue stripes which more closely patterned the original paint scheme of the 1969 Trans Am. Along with the stripes, blue streamline graphics were added on the sides and blue anodized wheels were included with this package.
The LS1 Firebirds were among the fastest ever produced. Outfitted with the all-aluminum 5.7L V8 from the Corvette C5, and producing 300 hp at 5,200 rpm; 335 ft·lbf (454 N·m) , 454 Nm @ 4,000 rpm (310 after 2000) or 320 hp (325 after 2000) in the WS-6 "Ram Air" version, these Fourth Generation Firebirds could out-perform just about any of their predecessors (including the original "muscle car" Firebirds).
Average quarter-mile elapsed times for the Fourth Generation Firebirds were reported as 15.2 seconds at 90 mph (140 km/h) for V6-equipped vehicles, and 13.2 seconds at 110 mph (180 km/h) for those with the V8; in the hands of an experienced driver, the latter cars have even been known to "crack" the 12-second quarter mile mark. Top speeds for both the V6 and V8 versions were generally governed according to their factory tire ratings, which were typically 118 mph (190 km/h) for the V6 models. However, with the governor programmed out and applying V8 speed rated tires, V6 Firebirds will reach in excess of 130 mph (210 km/h) (4th gear limited) with the Y-87 performance package and a 5-speed transmission, whereas V8 models that had Z-rated tires had a speed limiter set to 167 mph (269 km/h).