These lightweight aluminum high-performance intake manifolds are exact copies of the manifolds Carrol Shelby offered on his Shelby's and Cobra's in the mid-1960s as well as being sold over the counter for several years. Great way to improve performance and keep authentic period correct appearance. Fits 260, 289, and 302 Engines. Designed to deliver increased performance across nearly your entire power band, giving you optimum power from 1,500 to 6,500 rpm, while retaining good bottom-end power and throttle response. The intake manifold has a rear water crossover to aid in cooling, two extra NPT ports, crossover intake runners for a more balanced length, and nitrous bosses.