The cam positions of the camshaft include {HEAD ~ secondary lobes} in conjunction with {TAIL ~ normal primary lobes} 
The cam positions of the camshaft include { HEAD ~ secondary lobes } in conjunction with { TAIL ~ normal primary lobes }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL