This high performance aluminum intake manifold has a satin finish and delivers excellent all around performance. With a dual plane high rise design, it delivers optimum power from 1500 to 6500 R.P.M. Our manifolds are not sand cast but precision die cast in steel dies rather than sand molds like other manufactures. Sand cast manifolds can be vulnerable to internal core shifts which can cause misalignment between ports and heads or even air or coolant leaks. Each manifold is subjected to a thorough pressure test to assure a trouble free installation. Extra features include mounting kit to ease installation, rear water crossover to aid in cooling, two extra NPT ports, crossover intake runners for a more balanced length and nitrous bosses. Dyno tests have proven that this manifold equals or outperforms the equivalent top rated brands.