here is the link
http://www.billetflow.com/supercharger_pulleys.htm
Belt Selection Guide
Note: We only carry a few belt sizes
(a good place to order belt online is
www.rockauto.com )
Use the following 5% discount code at RockAuto: 647174351781
No Idlers
Pulley Size.....Belt Size.......Gates Part No......Gatorback Part No.
3.65 (stock).....75.1" .............K080751................4080750
3.40................75".................K080750... .............4080750
3.10................74.5...............K080745.... ............4080745
With Single Snub Idler and Bracket Kit
Pulley Size.....Belt Size.......Gates Part No......Gatorback Part No.
3.65...............75.5"...............K080755.... ............4080755 (can not use New Bracket)
3.40...............75.1"...............K080751.... ............4080750 (can not use New Bracket)
3.10...............74.5"...............K080745.... ............4080745 (must use 92mm Idler Pulley)
2.93...............74.5"..................K080745. ...............4080745 (with 100mm Idler)
2.76...............74.5"..................K080745. ...............4080745 (with 100mm Idler)
With 4 Pulley snub Idler Kit (3-100mm and 1-92mm)
Pulley Size....Belt Size........Gates Part No......Gatorback Part No.
3.65..............77"...................K080772... ............4080772 (can not use New Bracket)
3.40..............76.5"................K080765.... ...........4080765 (can not use New Bracket)
3.10..............75.5"................K080755.... ...........4080755 (must use 92mm Idler Pulley)
2.93..............75.5"................K080755.... ...........4080755 (with 100mm Idler)
2.76..............75.1".................K080751... ............4080750 (with 100mm Idler) (Stock Belt)
With 4 Pulley snub Idler Kit (3-100mm and 1-92mm) and 2lb Metco Lower kit
Pulley Size....Belt Size........Gates Part No......Gatorback Part No.
3.65..............XX.X"................K080XXX.... ...........4080XXX (can not use New Bracket)
3.40..............XX.X"................K080XXX.... ...........4080XXX (can not use New Bracket)
3.10..............XX.X"................K080XXX.... ...........4080XXX (must use 92mm Idler Pulley)
2.93..............78.0"................K080780.... ...........4080780 (with 100mm Idler)
2.76..............XX.X"................K080XXX.... ...........4080XXX (with 100mm Idler) (Stock Belt)
With 4 Pulley snub Idler Kit (3-100mm and 1-92mm) and 4lb Metco Lower kit
Pulley Size....Belt Size........Gates Part No......Gatorback Part No.
3.65..............XX.X"................K080XXX.... ...........4080XXX (can not use New Bracket)
3.40..............XX.X"................K080XXX.... ...........4080XXX (can not use New Bracket)
3.10..............XX.X"................K080XXX.... ...........4080XXX (must use 92mm Idler Pulley)
2.93..............XX.X"................K080XXX.... ...........4080XXX (with 100mm Idler)
2.76..............XX.X"................K080XXX.... ...........4080XXX (with 100mm Idler) (Stock Belt)
With 4 Pulley snub Idler Kit (3-100mm and 1-92mm) and 6lb Metco Lower kit
Pulley Size....Belt Size........Gates Part No......Gatorback Part No.
3.65..............XX.X"................K080XXX.... ...........4080XXX (can not use New Bracket)
3.40..............XX.X"................K080XXX.... ...........4080XXX (can not use New Bracket)
3.10..............XX.X"................K080XXX.... ...........4080XXX (must use 92mm Idler Pulley)
2.93..............XX.X"................K080XXX.... ...........4080XXX (with 100mm Idler)
2.76..............XX.X"................K080XXX.... ...........4080XXX (with 100mm Idler) (Stock Belt)
With 4 Pulley snub Idler Kit (3-100mm and 1-92mm) and 8lb Metco Lower kit
Pulley Size....Belt Size........Gates Part No......Gatorback Part No.
3.65..............XX.X"................K080XXX.... ...........4080XXX (can not use New Bracket)
3.40..............XX.X"................K080XXX.... ...........4080XXX (can not use New Bracket)
3.10..............XX.X"................K080XXX.... ...........4080XXX (must use 92mm Idler Pulley)
2.93..............XX.X"................K080XXX.... ...........4080XXX (with 100mm Idler)
2.76..............XX.X"................K080XXX.... ...........4080XXX (with 100mm Idler) (Stock Belt)