S&S CNC PORTED 55MM 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. Knowing polished porting has little impact on the intake side, we've 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