DJ Safety blower restraint kit 14.1. This restraint kit includes a SFI approved blower restraint, nylon restraint straps covered in silver fire protectant sleeving, black powder coated steel header brackets, and alum. quick release pins. This restraint can fit all 10-71 thru 18-71 roots blowers with the large top opening . Typically fits the buzzard opening. Bolt centers are 15.250″ and opening in the restraint are 15.06″ x 4.430″. Specify engine brand, blower size and blower manifold brand when ordering as well as supercharger brand. Common strap lengths can be chosen from the drop down menu. This is a guideline and the racer should check measurements before ordering: SBC 15.00″, BBC 18.00″, Fuel Head Hemi 21.00″, Fat Head Hemi 24.00″ but remember custom strap length can be ordered at time of placing order but customer must specify what length they are after.