What size is the stock supercharger pulley on a 1999 grand prix gtp?

The stock supercharger pulley on a 1999 Pontiac Grand Prix GTP is typically 3.8 inches in diameter. This pulley is designed to provide the optimal boost for the supercharged 3.8L V6 engine, balancing performance and reliability. Upgrading or changing the pulley size can affect the boost levels and overall engine performance.