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This complete top end rebuild package features a premium Wiseco 98mm Pump Gas Big Bore Piston and BPRATV Nikasil Cylinder
Comprehensive Gasket Kit: Ensure a perfect seal with our top and bottom end gasket kit
FITS ALL YFZ450R YEARS AND MODELS
New improved Maxlock heavy-duty head stud kit
17-19 Polaris ACE 500 Cylinder Bolts Head Bolts Titanium Head Studs Kit 7520144 Cylinder Works This complete top end rebuild7520144, 82 83500, 9Z 570TIHD, BL181A1025 Fits Polaris Ace 500 Models Years 2017 2018 2019 Replaces Polaris OEM Part # 7520144 Unleash Maximum Power and Performance with Titanium Toughness Maxlock Grade 5 Titanium alloy head studs cylinder bolts 45% lighter than chromoly, yet just as strong More heat and corrosion resistant than chromoly Titanium 12 point flange nuts and 3mm thick washers Delivers more clamping force for a tighter, longer lasting seal