The invention is an automotive catalyst system for treating internal combustion engine exhaust gases, the system comprises: a hybrid of hydrocarbon trapping material and a palladium based {TAIL ~ three way catalyst material}, the hydrocarbon trapping material being capable of adsorbing hydrocarbons present in internal combustion exhaust gases and substantially maintaining adsorbance of the hydrocarbons until after the three way catalyst material reaches a temperature at which it is capable of oxidizing hydrocarbons, {HEAD ~ the three way catalyst} being carried on a substrate in an amount of between about 100 500 g palladium/ft3 of substrate 
The invention is an automotive catalyst system for treating internal combustion engine exhaust gases , the system comprises : a hybrid of hydrocarbon trapping material and a palladium based { TAIL ~ three way catalyst material } , the hydrocarbon trapping material being capable of adsorbing hydrocarbons present in internal combustion exhaust gases and substantially maintaining adsorbance of the hydrocarbons until after the three way catalyst material reaches a temperature at which it is capable of oxidizing hydrocarbons , { HEAD ~ the three way catalyst } being carried on a substrate in an amount of between about 100 500 g palladium / ft3 of substrate
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