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Unread 05-11-2004, 02:19 PM   #1
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Join Date: May 2004
Posts: 34
Jeep ZJ Cat Back System

I have a 93 JGC 4.0L. About 6 or 7 yrs ago my exhaust manifold developed a crack in one of the welds. After doing some research I chose to install Borla headers instead of a stock manifold. A few years later my catalytic needed replacing. I chose to go with a high flow version to complement my Borla headers.

Finally I think its time to replace my stock muffler and tail pipe. I have been waiting for the muffler to pack it in but it just wont. I have almost 350,000kms but the muffler wont quit. I cant wait any longer I am itching to install a cat back system.

I have been really happy with my Borla headers. In my opinion Borla products are first rate. So naturally when it came to shopping for cat back systems I visited Borla first. I have no doubt about their workmanship and overall quality. I was dead set on getting the Borla Cat Back when I came across another manufacturer...Dynomax.

According to the Dynomax website their stainless steel cat back system out flows Borla by a fair margin. Here is a link to the graph

The Dynomax Ultra Flo SS is 100% stainless steel and comes with a lifetime warranty.

I have done a search on this forum for Dynomax. Most members here have made positive comments regarding Dynomax's cheaper Turbo model.

The Ultra Flo SS is substantially more expensive. I want to go with a premium quality cat back to complement the rest of my exhaust system.

Im looking for member feedback as to which way I should go. Borla, Dynomax or some other brand?


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Unread 05-11-2004, 04:18 PM   #2
Texas ZJ1
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Join Date: Mar 2003
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For performance mods, you need to email Nick Kolak at

He can give you great advice on these things.

00 4.7 Laredo...stock

94 5.9 Laredo 6.5 RE lift with 35 Maxxis Bighorns
and 33 Bridgestone Duelers
Detroit and true trac
Red Jeep Club Member
Texas Jeep Owner #6
USN Jeep Club #4

For your performance needs:
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