Turblown Inconel Shields for your 13B & 20B lower intake manifolds. It is common knowledge rotary engines are notorious for achieving extremely high exhaust gas and under hood temperatures. While vented hoods and elaborate front end ducting is beneficial, the true priority to heat management is controlling it at it's source.These shields are constructed of 700 series Inconel. Inconel when heated produces a natural oxide barrier that heat wrap, heat tape, aluminum, or stainless shields do not produce. These heat shields are the best heat management money can buy.