The Tuned Induction systems are for riders who are seeking the greatest possible performance gains from their engines. By utilizing air column inertia and carefully timed gas dynamic pressure waves, the Tuned Induction systems ram additional air into the cylinders for increased power. The most pronounced effect of this natural “supercharging“ effect is increased midrange torque, right where the street rider needs it most. Air filter area is almost two times that of an S&S Teardrop air cleaner.

The Dual Bore tuned induction system has independent tuned length intake runners, one for each cylinder. It fits dual bore S&S Magneti Marelli style EFI systems.