A filter pack is disposed within the combustion chamber along {TAIL ~ an inner diameter} of {HEAD ~ the outer wall} 
A filter pack is disposed within the combustion chamber along { TAIL ~ an inner diameter } of { HEAD ~ the outer wall }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD