240z Speedometer Cable Grommet
$20.00Price
240z Speedometer Cable Grommet on firewall
The grommet will need to be cut, so it can ge glued back together once installed around the cable. The ends of the speedo cable are too large and grommet will not fit over.
Either regular super glue or Loctite 406, which is made for rubber and high heat, will work.