A throttle body spacer will insulate your TB from the heat of the supercharger. Keeping your TB cool will help keep your intake temperatures down thus reducing KR and increasing HP potential. 

The inlet is 72mm to work great with stock or our ported throttle bodies. 

Series II '97-03 supercharged L67 & '04-05 Monte/Impala (supercharged only) spacer includes: 

• 3/4" spacer
• 2 gaskets
• 3 longer studs
• Detailed instructions 

Series III '04+ Grand Prix GTP spacer includes: 

• 1/2" thick spacer
• 4 new bolts 
• RTV

Does not fit RWD applications - for example Camaro/Firebird. 

Torque Specs: Throttle body: 84-89 in/lbs.