S&S Cycle M8 Models Premium 55mm CNC Ported Manifold - BlackS&S Cycle has upped our intake game with a new M8 manifold and leveraged a 5 Axis CNC machining center for the ultimate in consistent shape and flow characteristics. S&S machined a uniformly spaced and shaped texture that not only creates a larger surface area to encourage fuel dissipation, but also superior atomization of the fuel air mixture. The S&S Cycle CNC ported manifold fits all 55mm throttle bodies and works excellently with factory as well