Most of the four groove Jackson Racing pulleys had a 0.8" offset, however a few of them had a 1" offset.
1320 B series JRSC Jackson Racing supercharger Upper & Lower bracket B16 gsr si
1320 D series JRSC Jackson Racing supercharger Tensioner bracket assembly D16
Jackson Racing M45 Supercharger Pulley
B-Series Alternator pulley for Jackson racing supercharger JRSC-Anodized black
M45 MP45 Like New Gen 4 5 Magnuson Jackson Racing Miata Supercharger Rotor Pack
Mini Cooper Jackson Racing Eaton Supercharger Bearings Coupler New M45
