The palladium based three way catalyst is carried on {HEAD ~ a substrate}, which may be the trapping material, in an amount of between {TAIL ~ about 100 500 g palladium/ft3} of substrate 
The palladium based three way catalyst is carried on { HEAD ~ a substrate } , which may be the trapping material , in an amount of between { TAIL ~ about 100 500 g palladium / ft3 } of substrate
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH