An engine comprises an intake manifold, first and second cylinder banks, a turbocharger, a flow passage, and first and second cylinder banks. The first and second cylinder banks are each in fluid communication with a respective output of the intake manifold. The turbocharger is associated with the second cylinder bank and includes a compressor input port and a compressor output port. The flow passage is in fluid communication with each of the compressor output port and an input of the intake manifold.