AVK2T2 Air Control Valve kit 4 ports

When incorporating an air bypass valve into an induction system with individual butterflies, it is important to ensure that the air is evenly distributed between cylinders. To achieve even distribution we recommend that a suitable distribution manifold (see below) is placed between the bypass valve and the inlet tracts such that the tubes to each cylinder are all of the same length. The preferred position to introduce the air, particularly if the injector is not aimed directly at the back of the inlet valve, is near to the injector, thus providing optimum conditions for air/fuel mixing. Positioning the extra air inlet near the bottom of the tract should be avoided to prevent fuel flow-back under certain conditions.