Sam Walters wrote:
<snip
 > Since two  people had the plug blow out, what is the plug you were
sent made of and how is it tightened
<snip>

My mistake was not checking the plug for tightness.  I simply observed
that a plug was there.  Had I checked it for tightness I would've
probably noticed what it was made of, too.

I installed the exhaust system and got underway.  About 2 blocks later
... the exhaust tone changed and I found that the plug was no longer
there.  Hence the plugging of the hole with an oil drain plug of the
proper size.

Mike