Our unique design consists of two cross over pipes which both serve their own purpose. The upper crossover serves as a pressure equalizer between the two sides and since it’s in more of a direct path of flow this effectively raises the pitch, bringing back a little more of the F1 sound. The lower crossover serves as a scavenge. This is where the power is made. It is purposely placed at the very end of a straight section where velocity speeds up to increase its pulling/suction effect as the air pulses. Air gets pushed passed it effectively aiding in the up stroke of the opposing cylinders exhaust stroke. This basically creates negative pressure in the cylinders up stroke which is the opposite of what a positive pressure i.e. turbo/supercharger motor does and has the same effect just not as drastic as positive pressure.