It includes bolts and spacers to mount the bracket to most roots blowers from 4-71 thru 16-71 roots blowers. This bracket uses the industry standard .750" T-nut slot.
Fits Littlefield, Blower Shop, GMC, Hampton, BDS, Dyers, Kuhl, Mooneyham but not Fowler, SSI, DMPE, Kobelco or SCS superchargers.
Please specify blower snout length when ordering idler bracket assm.