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Old 02-02-2013, 12:44 AM   #1 (permalink)
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Default high flow catalytic converter

I have a 2003 mazda 6 s
I was looking at magnaflow high flow catalytic converter and it says they have both rear passenger ver. and rear driver ver.
What is the difference and does the cat converter change the performance or the sound of the exhaust?

THX!
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Old 02-02-2013, 01:18 AM   #2 (permalink)
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You have 4 different cats on a 6s. two for the front and two for the rear bank of cylinders. AFAIK magnaflow makes cat's for our car but not High Flow versions. The BEST way to get what I think you're looking for is a set of MSDS headers and their High flow single cat setup. The problem with a cat-back exhaust system is the 4 cats ahead of it.
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Old 02-02-2013, 10:11 AM   #3 (permalink)
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I dont really have the money to buy a header right now so i was just looking at high flow cat. In that case which do you guys recommend i like this one personally.

MagnaFlow High Flow Catalytic Converter 06 05 04 03 Mazda MAZDA6
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Old 02-04-2013, 06:52 PM   #4 (permalink)
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This is the rear cat on the vehicle. the two that fail most often are the ones closest to the heads. I understand you're trying to "get power where you can" but with the history these cars have with pre-cat failure it's really not something you want to chance. If that was the cat that failed, go for it, but since it's not...

Save your money for the headers if it's power you want. No use in replacing the rear cat with high flow if it's the pre-cats that choke you up.
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