Borla Cat Back
Thread Starter
Advanced
Joined: Apr 2018
Posts: 60
Likes: 6
From: Plainwell MI
Borla Cat Back
Was under my newly purchased 1984 for the first time. I noticed the exhaust was not stock. It is a Borla cat back system. Love that but this one is much more quiet than the one I had on my '94 Trans Am. Did this on my '92 T/a also, it was quiet too. Ended up gutting the cat. I know there is not a lot of performance gain but this Vette needs a bigger voice. This did wonders on the '92. Any draw backs been encountered gutting a cat on a 1984? If not I'll go ahead with it.
Safety Car
Joined: Jan 2014
Posts: 4,017
Likes: 492
From: Poughkeepsie New York
Borla offers venturi's to place inline before the mufflers. Maybe you have them on your car? I have a borla catback and I had to put silencers in my mufflers to get rid of the drone.
Last edited by Dt86; Apr 28, 2018 at 11:50 AM.
Team Owner
Joined: Jul 2004
Posts: 28,379
Likes: 3,262
From: Hartford WI
Last time I checked, it wasn't stock so hard to say about the venturi in his car. He'd have to pull it apart and look
Le Mans Master
Joined: Aug 2017
Posts: 6,937
Likes: 1,487
From: New Jersey
No downside to hollowing the cat out except emissions of you're tested.
Last edited by 84 4+3; Apr 29, 2018 at 02:12 PM.
