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Old 03-08-2004, 06:45 PM   #1
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Default Aftermarket Catalytic Converter

Has anyone put on a generic aftermarket Cat, only to find out it is fairly noisy? Instead of going for a OEM one, I went for a Walker. But since then it has been fairly noisy, especially when accelerating.

I have changed the muffler (another Walker), as well as the exhaust seal (donut) - the only thing not changed is the pipe itself. The only thing I can think is that the Cat wasn't installed properly (there is still a leak somewhere) - my mechanic used muffler clamps instead of welding. Would that cause the noise - any experiences?

Thanks.
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Old 03-08-2004, 08:08 PM   #2
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Default Re: Aftermarket Catalytic Converter

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Originally Posted by faisalmali
Has anyone put on a generic aftermarket Cat, only to find out it is fairly noisy? Instead of going for a OEM one, I went for a Walker. But since then it has been fairly noisy, especially when accelerating.

I have changed the muffler (another Walker), as well as the exhaust seal (donut) - the only thing not changed is the pipe itself. The only thing I can think is that the Cat wasn't installed properly (there is still a leak somewhere) - my mechanic used muffler clamps instead of welding. Would that cause the noise - any experiences?

Thanks.
clamped the cat on... umm... that doesn't sound right...
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Old 03-08-2004, 08:53 PM   #3
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Take it back and have them check for leaks. I wouldn't think an aftermarket cat would change your exhaust sound levels much. I had one installed in my Lesabre which they used clamps on. The guy had to work a bit to get it to seal.

How much was the Walker cat worth do you know?

Cheers,
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Old 03-09-2004, 11:27 AM   #4
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Only $80 (and $70 for installation), so that'* why I didn't feel too ripped off.

My emissions is coming due, so I am panicking a bit.
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Old 03-09-2004, 11:58 AM   #5
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Is it a Walker PERFORMANCE cat? If so, I would expect a slight change in exhaust sound. If you did the muffler, too, I would definitely expect it. It all depends on whether you bought performance hi-flow components or not.

Get them welded, in either case.
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Old 03-09-2004, 12:25 PM   #6
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No, it was a standard cat and muffler.

Thanks. I'll get it welded.
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Old 03-09-2004, 04:54 PM   #7
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hehe, you have emmission testing in Toronto....none here in Halifax!
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