APR 2004-2009 Honda S2000 AP2 Brake Rotor Cooling KitThe APR Brake Cooling Ducts are aerodynamically optimized to "funnel in" massive amounts of air. Also known as the venturi effect, when the vehicle speed increases, this funneled in air increases in both pressure and velocity as it passes from the larger frontal area into the smaller pipe section of the brake duct. When matched with appropriate high temperature air duct hoses , the APR Brake Cooling Ducts will help to channel in large volumes of fresh