The S&S single bore tuned induction system is cool looking and delivers a healthy boost in midrange torque. Peak horsepower is also increased. The tuned runner system makes even more horsepower than an S&S teardrop air cleaner. Performance increases are across the board for stock and big inch engines alike. The heart of the single bore tuned induction system is the dual runner, two-into-one intake. The tuned runners are very similar in appearance to the dual runner intake for our dual bore induction system, but the design allows for more flexibility. Instead of bolting directly to a throttle body, the runners of the single bore induction join together in a smooth, flow enhancing curve and the unit bolts to an adapter bracket. The Tuned Induction System will not fit on motorcycles equipped with fairing lower glove boxes or Twin-Cooled models.