Exemplary substrate processing systems may include a lid plate. The systems may include a gas feed line having an RPS outlet and a bypass outlet. The systems may include a remote plasma unit supported atop the lid plate. The remote plasma unit may include an inlet and an outlet. The inlet may be coupled with the RPS outlet. The systems may include a center manifold having an RPS inlet coupled with the outlet and a bypass inlet coupled with the bypass outlet. The center manifold may include a plurality of outlet ports. The systems may include a plurality of side manifolds that are fluidly coupled with the outlet ports. Each of the side manifolds may define a gas lumen. The systems may include a plurality of output manifolds seated on the lid plate. Each output manifold may be fluidly coupled with the gas lumen of one of the side manifolds.