1 definition by magnEsium

Top Definition
rh
rh essentially can mean many things..

In this definition, RH means Race Header, an exhaust manifold and is illegal to use on US Public Highways and Roads because of the elimination of a Catalytic Converter, which causes green house gas emissions to enter the atmosphere and cause Global Warming. ..But who cares? :)
Jeremy has a RH on his 4 cylinder vtak.
by magnEsium January 07, 2007

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