Sandblasted and painted silver to keep from rusting Circumference measures 10” so 3.18” diameter Don’t know if that’s considered 3.2”
Magnuson MP112 Supercharger Rebuild Kit W/Rotor Pack Bearings Seals 5.3 Chevy
Supercharger Complete Rebuild fits Magna Magnuson SLP MP62 MP90 MP112
Supercharger Coupler & Oil Upgraded 8 oz fits Magnuson Roush TRD MP90 MP112 MP62
Supercharger Snout Rebuild SKF Bearing Seal Kit fits MP62 MP90 MP112 Magnuson
Genuine OEM Supercharger Coupler Isolator Magnuson MP45 MP62 MP90 MP112 MP122
Magnuson Magna Charger MP90, MP112, MP122 G4 inlet plenum gasket Saleen Series 2