This is one I bough from Jay's GN and kept on the car for many years. The Alternator stud wore through the pipe and the repair destroyed the chrome so I blasted it back to metal and PC'ed it black. It has a small mark under the PC where the repair was. This is an Aluminum pipel
The mark on the back
$30 + Shipping gets it.

The mark on the back

$30 + Shipping gets it.