The Box Ram manifold is designed to maximize power in big inch, high rpm engines. Designed for use with Dart’s Big Chief heads, the Box Ram is available in an 11 degree, 14 degree or 18 degree design. Versions are available for use with both oval and rectangular ports as well.

Top plates can be shimmed to adjust plenum volume for optimal performance, a pent roof design is available as well. The Box Ram can also be customized to fit single 4-barrel carburetors or split dominator.

If you’re looking for impressive power gains above 7,800 Rpm, you should be looking at the Box Ram manifold.