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. A variety of adapter brackets make it compatible with lot of different engine styles. Kits for 2008-2016 Touring models are designed to bolt directly to the ETC throttle body without an adapater bracket and include a black cover to hide the throttle body from view. Kits for all other models are actually composed of two kits: one with the induction runners and filter, the other woth the adapter bracket, breather and required hardware.