QUOTE(Tyler @ Jan 18 2010, 10:37 PM)

Your cars performance button only effects the shift points and firmness of the shifts. The hp ratings are the same for all 95 LT1 Firebird's.
I've been wondering because I saw this online while I was doing some research...
"A performance package was also offered. The package offered Polyurethane Bushings, suspension upgrades, as well as a freer intake/exhaust similar to that on the Chevrolet Corvette, supplying 310 hp to very few of the Firebird models; those that did receive this set-up were able to accelerate from 0-62 mph in 4.9 seconds and cover a quarter-mile in 13.2 seconds at 110 mph (180 km/h). The 'Perform Transmission' button, which was available in the 310 hp Trans Ams, gave a 25% increase in torque with every kickdown, and resulted in a maximum of 350 ft·lbf (470 N·m) of torque. Although the redline displayed on the tachometer was 5000 rpm, the engines were capable of revving to 7000 rpm.The Firebirds which had the package were among the fastest cars at the time."
http://www.firebirdfever.com/firebirdfever/historyta.html