S, Top End Guardian kit 917703 fits 18-25 Softail; 17-25 FLT/Touring, 17-25 Trike This kit is The One for a direct OEM parts upgrade, fits without modifications. Designed to pinpoint & eliminate weak points in the OEM M8 rocker design. Especially advised when changing to a hot cam (+.550" lift) and more performance in general. This kit combines several S sets to provide you with one complete top-end set up that includes everything for the engine to remain dependable with high horsepower and torque numbers. This Top End Gardian kit includes S 917702 +66% stronger rocker arm shafts, that replace OEM 17300059B. S 587241 rocker arm stud & nut kit, that replaces the OEM 10200503 bolts to prevent rockers coming loose and excessive wear on the tower studs. S 576972 cold rolled 8640 heat treated head bolt set, with 200.000 psi tensile strength, replaces OEM 10200303 head bolts and S 597871 roller rocker arms which prevent excessive valve thrust and stress, as happens with higher lift cams running at high RPM. Δείτε περισσότερα στον κατάλογο V-Twin Home > Parts > Engine > Top End > Rocker Arms > Arms & Arm Kits > S, Top End Guardian kit