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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14
Zinc Yellow-Chromate Plated Head Head Screw
For Harley Davidson '98 to '17 Big Twin models with 6 Studs Style Clutch and Diaphragm Spring
5" Long when opened up
Socket and collar are heat treated to 43 degrees HRC
Responds very well to increased bore and or compression
S&S 131" Big bore kit M8 Cylinder color finish:Wrinkle Black with Fin Highlights Zinc Yellow-Chromate Plated Head HeadS&S has been building big bore kits since the 60s and has it down to an absolute science. Our latest efforts are aimed at the Milwaukee Eight platform (2017 and newer big twins) and open up a whole new level of performance for these engines. Combining a new design forged piston with their 4. 25 cylinders to net a tire melting 131 cubic inches when paired with their 4. 625 stroker crank. We build our big bore kits and cranks to much tighter tolerances
