Straight off the GM Direct Parts website...
DESCRIPTION: 2.4L Twin Cam Supercharger
(Cavalier, Sunfire, Grand Am, Alero)
Add up to 50 HP and 40 lb-ft. of torque! Designed for 2000-2002 GM vehicles equipped with the 2.4 liter twin cam engine (engine code RPO LD9). Kit includes all mounting brackets, air ducts, adapters, Gen II MAP sensor and spark plugs. Can be installed with normal hand tools. Includes new serpentine drive belt.