Air Injection Manifolds

The air injection manifolds distribute air via the diverter valve to each of the exhaust manifold inlet ports. A check valve, incorporating a stainless steel spring plunger and an asbestos seat, is integral with each air injection manifold. The function of the check valve is to prevent the reverse flow of exhaust gases into the air pump during pump failure, drive belt failure, or diverter valve (by-pass) operation.