A fluid-cooled manifold for cooling exhaust from an engine, the cooled manifold comprising: a plurality of exhaust runners (102A-102D) including a first exhaust runner and a second exhaust runner, wherein the first exhaust runner is detached from the second exhaust runner, each of the plurality of exhaust runners (102A-102D) comprising: a runner body having an inlet end and an outlet end, an exhaust conduit extending through the runner body from an exhaust inlet opening at the inlet end of the runner body to an exhaust outlet opening at the outlet end of the runner body, and a coolant passage extending through the runner body from a coolant inlet opening to a coolant outlet opening; an exhaust collection manifold including a plurality of inlets (142A-142D), wherein each inlet of the exhaust collection manifold is coupled to the exhaust outlet opening of a respective one of the plurality of exhaust runners (102A-102D); a coolant feed pipe including a plurality of outlets (152A-152D), wherein each outlet of the coolant feed pipe is coupled to the coolant inlet of a respective one of the plurality of exhaust runners (102A-102D); and a coolant exit pipe including a plurality of inlets (156A-156D), wherein each inlet of the coolant exit pipe is coupled to the coolant outlet of a respective one of the plurality of exhaust runners (102A-102D), wherein each exhaust runner of the plurality of exhaust runners (102A-102D) has the same shape as the other exhaust runners (102A-102D) of the plurality of exhaust runners (102A-102D). a plurality of exhaust runners (102A-102D) including a first exhaust runner and a second exhaust runner, wherein the first exhaust runner is detached from the second exhaust runner, each of the plurality of exhaust runners (102A-102D) comprising: a runner body having an inlet end and an outlet end, an exhaust conduit extending through the runner body from an exhaust inlet opening at the inlet end of the runner body to an exhaust outlet opening at the outlet end of the runner body, and a coolant passage extending through the runner body from a coolant inlet opening to a coolant outlet opening; a runner body having an inlet end and an outlet end, an exhaust conduit extending through the runner body from an exhaust inlet opening at the inlet end of the runner body to an exhaust outlet opening at the outlet end of the runner body, and a coolant passage extending through the runner body from a coolant inlet opening to a coolant outlet opening; an exhaust collection manifold including a plurality of inlets (142A-142D), wherein each inlet of the exhaust collection manifold is coupled to the exhaust outlet opening of a respective one of the plurality of exhaust runners (102A-102D); a coolant feed pipe including a plurality of outlets (152A-152D), wherein each outlet of the coolant feed pipe is coupled to the coolant inlet of a respective one of the plurality of exhaust runners (102A-102D); and a coolant exit pipe including a plurality of inlets (156A-156D), wherein each inlet of the coolant exit pipe is coupled to the coolant outlet of a respective one of the plurality of exhaust runners (102A-102D), wherein each exhaust runner of the plurality of exhaust runners (102A-102D) has the same shape as the other exhaust runners (102A-102D) of the plurality of exhaust runners (102A-102D).