"The Natural Philosopher" wrote in message
...
snip

Which is why you can get generic clutch and brake linings etc at
much
lower costs than from the manufacturers. Though not all ARE made
EXACTLY
to spec, caveat emptor...


Not always though, at one time (when I used to do more mechanical
work) I was able to buy a genuine complete clutch kit for a GM
Vauxhall / Opal car from the main dealer cheaper than I could from a
motor factor - even though GM bought the clutches from the same
component supplier...