S&S 131" Big bore kit M8 Cylinder color finish:Wrinkle Black with Fin Highlights Responds very well to increased

Responds very well to increased bore and or compression

Simply flip the run switch and press this button

FLHTKSE (CVO Ultra Limited Electra Glide) 12" bars

84'-94' FXR MODELS AND 99'-'00 FXR MODELS (MID OR FORWARD CONTROLS)

together with aerospace fasteners

S&S 131" Big bore kit M8 Cylinder color finish:Wrinkle Black with Fin Highlights Responds very well to increasedS&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