[ar0ck]

Taken from Pontiac High Performance:
http://www.highperformancepontiac.co...ird/index.html

A beefier L99 was the end result of the modifications. The boosted 265 put out 339 hp at 5,750 rpm, with 364 lb-ft of torque at 3,250. This was an increase of nearly 140 hp and 125 lb-ft over the production version with only 8.5 psi. With another 5 pounds of boost, this little V-8 would have been at 425 plus horsepower, though the durability of the stock rotating assembly would likely have been diminished.

The performance was quite impressive and clearly indicative of the potential for a lot more. Coupled to a stock six-speed transmission and 3.42 gears, the Firebird ran 0-60 in 5.2 seconds, with a best of 13.47 at 106 mph in the quarter.

A tank for the air-to-liquid intercooler was mounted near the radiator core support. It held a mild glycol solution that was pumped into the cooling element in the blower manifold to reduce charge-air temperatures.