It is available for the std 23 degree cyl heads. This manifold, despite being a racing model, has been our number one seller for the past several years. Thats because it is very affordable and also produces more power and torque than competitive models and uses less fuel doing it which means it is a very efficient manifold. We now have an improved model called the Hurricane+Plus but will continue to offer this manifold because it is lower priced and is more than suitable for many racing applications, particularly in claimer type classes where it is important to keep engine costs low. Features include nitrous bosses, dual distributor holddowns, four corner water ports plus a fifth pipe tapped water outlet in the front of the manifold. This manifold will also fit 87-95 angle bolt heads.