With the introduction of the NEW BP BR X 18™, BRODIX® has once again set the standard in the big block Chevy compatible market. Inspired by Pro Stock technology, the BP BR X 18 far outshines all others in its class. This head features a NEW 18° valve angle, designed to produce the maximum amount of torque and horsepower, in a conventional package. The intake port is raised .900 and amazingly flows over 535 cfm with a 2.500 valve! The exhaust port flows over 340 cfm through only a 1.830 valve! This head also has an extremely efficient 93 cc combustion chamber that is nitrous friendly. This head requires pistons, valve covers, shaft rockers, and an intake manifold specifically designed for the BP BR X 18. As always, these NEW heads come standard with all of the fine qualities that only BRODIX has to offer.