{HEAD ~ Device} for changing {TAIL ~ the timing} of intake and exhaust valves in an internal combustion engine 
for changing
{ HEAD ~ Device } for changing { TAIL ~ the timing } of intake and exhaust valves in an internal combustion engine
HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH