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 three way catalyst material, the hydrocarbon trapping material being capable of {HEAD ~ adsorbing hydrocarbons} present in {TAIL ~ 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, 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 three way catalyst material , the hydrocarbon trapping material being capable of { HEAD ~ adsorbing hydrocarbons } present in { TAIL ~ 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 , 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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