This avoids the expense of providing a dedicated gauge or readout and {TAIL ~ also the need} to provide a path through {HEAD ~ the vehicle firewall} during installation of the device 
This avoids the expense of providing a dedicated gauge or readout and { TAIL ~ also the need } to provide a path through { HEAD ~ the vehicle firewall } during installation of the device
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH