Cyl Base Nuts Hi-Torque Style Big Twin 1936/1984 Chromed Hex For Big Bore Colony.8600-8 These cylinder base nut kits are the finest available. American made and fully chrome plated to last a lifetime. Available in various styles to fit most applications. Number of pieces in each kit indicated in ().Hi-Torque Style. Fits Big Twin Models 1936/1984 for Big Bore (8).