Bill Freeman wrote:

Keith,

I have seen the pop-off valves for the 911, but never
bothered to buy one for mine.  Any insight into how to
avoid a backfire?  I have had my 911 for a long time and
no backfires.  Maybe just lucky.  Perhaps some years or
other variations are more likely to backfire??

You beat me to the punch - I was thinking about it a few
nights ago but forgot to send it in.

Good tip, should make a composite manifold acceptable.

Anyone know if any of the current production plastic
manifold cars us a pop-off valve to protect it??  Might be
a cheaper source if so.

Bill

The new LS1 Chevy V8 has a composite intake manifold.
I wonder if it has a pop off valve.

Paul Lamar
 
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