Miata Mailing List: July 1993, Message #61
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   From: Al Jenab 
Subject: RE>Borla Mufflers
   Date: Thu, 8 Jul 1993 09:41:28 -0400


Herb Samuels writes:
"The exhaust sound and slight increase in power of the Borla muffler
are appealing.  I have three questions.  How much louder do you think
the Borla is compared to the stock muffler?"

Lots louder.  It's about as loud as the Walker muffler I had prior to the
Borla.  But the note is more pleasant.  I should say that I've removed some
sound insulation from under the rear shelf behind the seats so I could put
in my roll bar.  I've also got a couple of large holes in the shelf going
straight through to the trunk for the same reason.  So I've got a different
interior resonant behavior than stock.  Don't have a sound meter, but in
my car there's a definite increase in levels which may be too loud for
some folks.

"How much did it cost and where did you buy it?"

It cost me $299 and comes in two pieces: a SS muffler section and the SS
connector pipe to the converter.  The connector pipe has SS heat shields
spot-welded to it to protect the differential.  It also comes with a SS
muffler clamp, but no new rubber doughnuts.  Fit was so-so.  Could have
been better.  I got it through Mazda Performance Buyers Club
1-800-358-4093.  I think the price represents about $100 bucks off list.


"Finally, there was a past post by someone
indicating that were planning to install a Borla muffler but they had
installed a Trackbar and wondered if the design shape or size of the pipe
from the catalytic converter to the muffler might impinge on the Trackbar.  In
some cases the stock muffler does but this can be adjusted.  Has anyone
installed a Borla and a Trackbar who might answer this question?"

I have the Track bar and it wasn't much of a problem getting the Borla to
fit.  I had much more difficulty with the Walker.

-Al