{TAIL ~ Cylinder head} 15 may be made of aluminum or {HEAD ~ steel} in the normal manner 
{ TAIL ~ Cylinder head } 15 may be made of aluminum or { HEAD ~ steel } in the normal manner
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH