With Metco's Interchangeable Crank Pulley Package one can increase the boost on their 2012+ Camaro Zl1 without making any permanent modifications. Boost levels range from 2 to 6 lbs of additional boost and can easily be changed out to increase or decrease boost.

Notes:

• 9.10" & 9.55" rings should use a Metco's 50mm crank idler pulley
• 10.00" & 10.50" rings should use a Metco's idler relocation bracket and the 50mm idler pulley

Supercharger Belt Lengths:

• 8.60″ Crank pulley ring and stock idler pulley: 67.5″ Belt
• 9.10″ Crank pulley ring and 50mm idler pulley: 68.0″ Belt
• 9.55″ Crank pulley ring and 50mm idler pulley: 69.0″ Belt
• 10.00″ Crank pulley ring with 50mm idler pulley and idler relocation bracket: 71.5″ Belt
• 10.50″ Crank pulley ring with 50mm idler pulley and idler relocation bracket: 72.5″ Belt (Estimated)