We have discovered that pre drying the HC trap and the catalyst system itself prior to cold start, leads to substantial improvements in {HEAD ~ the overall performance} of {TAIL ~ the system} 
of
We have discovered that pre drying the HC trap and the catalyst system itself prior to cold start , leads to substantial improvements in { HEAD ~ the overall performance } of { TAIL ~ the system }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL