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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 06-16-2006, 03:53 PM   #1 (permalink)
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Choosing a Cat

I'm in need of a new catalytic converter but I've seen at least six different brands and a price range from less than $100 through above $500! So many cats, what's one to do? Does price matter? I'm just trying to pass inspection.
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Old 06-16-2006, 06:13 PM   #2 (permalink)
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There are two stages you have to take to decide the one that you need. First stage is how it fits: Do you have a welder, and required tools to install a universal? Is your exhaust in good enough shape to be welded? Or is a direct fit a better choice for you? The second stage is quality, this affects the first question too, paying a little more for a better quality direct fit will ensure that it will be a "direct fit". Cheaper universals often time rust out quicker than thicker metal ones.

So this is a question that is better answered by you...
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Old 06-16-2006, 07:26 PM   #3 (permalink)
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I bought a universal, only because I will be getting a custom exhaust done in about a year and a half. works fine.
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Old 06-17-2006, 10:46 PM   #4 (permalink)
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I'm getting a direct fit actually, and they still range from $100-500...so I'm to assume the more expensive ones just have thicker metal? That's it?
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Old 06-18-2006, 08:26 AM   #5 (permalink)
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Thicker metal, better fit, better welding, and over all look nicer. Some of the more costly ones even come with the heat shelds.
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Old 06-18-2006, 02:04 PM   #6 (permalink)
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Ah, yeah I noticed that, the heat shields! Cool, thanks for clearing that up!
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