The unique design of these caps allows the use of 33 mm intake valves in the GS head without having to split the rocker arms or angle the valves. The only modification required is a relocated keeper groove in the valve. APE also manufacturers standard type 5 mm and 5.5 mm lash caps. The popularity of AMA Prostars Pro Superbike class, and the addition of nitrous oxide on the classes 750s has prompted APE to add more models to their popular line of bolt on nitrous manifolds. The manifold plate has a port size the same as a stock head, therefore best results are achieved when the manifold is bolted to the head and ported to match the intake port.
All kits come complete.