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Cat Replacement

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Old 09-08-2010, 06:26 PM
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Location: Kelowna, BC
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Car: 1974 Camaro Z28 Type LT
Engine: 350 sbc
Transmission: Borg Warner T5
Cat Replacement

How do you know when to replace the cat in a car?

Long story made short, I've got an 89 Firebird with a sbc 305. It's got 300k+ km on it, and I'm pretty sure that it's still got the original cat in there. I know that cats will plug up over time, but I have no idea what symptoms it might show.
Old 09-09-2010, 02:04 PM
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Car: 91 Z28
Engine: 383 SuperRam
Transmission: ProBuilt 700r4
Axle/Gears: G92 3.23
Re: Cat Replacement

rattling inside the cat when you hit it.
lack of power the higher the rpm's go.
high emmisions.
cat glowing.
Old 09-10-2010, 07:21 PM
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Car: '82 Z28
Engine: 305 LG4
Transmission: 200c
Axle/Gears: 3.42
Re: Cat Replacement

Had Midas install standard replacement unit in my '82 for around $250. Breaths a lot better and has a little more snarl/burble now. Have only 111,000k on car,
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