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gutted cat or pioe to replace it?

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Old Feb 11, 2014 | 12:35 PM
  #1  
Nickmiceli7's Avatar
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From: Hobart, Indiana
Car: 1991 Firebird
Engine: stock 305
Transmission: Stock auto
Axle/Gears: stock
gutted cat or pioe to replace it?

I have a flowmaster setup on my car (305tbi bird) I no longer have to pass emssions here and I was going to gut my cat but keep the flowmaster muffler...

Question is does anyone have an exhaust clip of a setup like this?

What's everyone's ooinion in doing it? I like the sound now but I'd like to get it a tad louder lol... some peoole are saying a gutted cat creates a sound similar to a shitty old pickup truck but I don't see how that would be if I keep my flowmaster..

Also some said if you put a pipe through the cat instead of just hollowing it that it would make it sounded better versus just a hollow cat...

Opinions? Sound clips anyone???
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Old Feb 11, 2014 | 01:01 PM
  #2  
RedLeader289's Avatar
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From: Louisville, KY
Car: 1983 Z28
Engine: 385 Fastburn
Transmission: T-5
Axle/Gears: BorgWarner 9-bolt posi, 3.27 gears
Re: gutted cat or pioe to replace it?

I don't have any sound clips but can say from experience that all a gutted cat does is act as an echo chamber for the exhaust. Doesn't sound bad, just doesn't necessarily do very much.

Gutting a cat is a tedious job (been there, done that, on a jeep). If you don't get every little piece out then it can rattle and sound like craaaaap. If you aren't required to make emissions or any kind of visual inspection then you would save yourself time and effort to just cut it off and install a pipe in it's place.
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Old Feb 11, 2014 | 08:23 PM
  #3  
85ttopsz28's Avatar
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From: near STL in IL
Car: '85 camaro z/28
Engine: 305
Transmission: 700R4
Axle/Gears: stock
Re: gutted cat or pioe to replace it?

yeah just take the cat out and replace it with a pipe. Easier and better sounding.
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Old Feb 12, 2014 | 12:45 PM
  #4  
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Car: '82 Berlinetta/'91 Firebird
Engine: 5.0/3.1
Re: gutted cat or pioe to replace it?

Definitely go for the pipe. This option will give it a louder note and probably a bit of a raspy tone on downshifts.
Completely gutting a cat is quite a long job, and you are very likely to leave pieces behind which will make it sound like crap!
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