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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 08-09-2006, 09:20 AM   #1 (permalink)
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What high flow cats are recommended?

I want to do my exhaust in the near future and I am thinking of using a Magnaflow or Borla muffler, some universale high flow cats, and having my friend make the piping from the cats back to the muffler. I don't see any need in spending the expensive amount that companies charge just because the make of the car... What companies make a reasonably priced high flow cat? On my e36 325i I used to have I used a Ractive high flow cat and their twin silencer muffler and it sounded pretty darn good! But this time I want to use a name brand muffler etc.
Thanks in advance!

David
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Old 08-09-2006, 05:30 PM   #2 (permalink)
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let us know what you go with, im looking to replace my 540's cats too. i was gunna go with CatCo or magnaflow.
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Old 08-10-2006, 11:56 AM   #3 (permalink)
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I found the Magnaflow cats part number-94004 for I think 57.00 each. I'm gonna do those and 2 of the Magnaflow mufflers part number-14805.

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Old 08-10-2006, 10:40 PM   #4 (permalink)
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you guys are lucky you don't live in CA.

As for high flow cats for me, I had to get CARB certified, OBD-II compliant cats that ended up costing WAY TOO MUCH MONEY.

Most of the other high flow cats are 49 state legal. Love how CA is the ONE state not included. :
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Old 08-11-2006, 09:46 AM   #5 (permalink)
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Ahhh we never realize how good we have it here in Alabama! No restrictions!
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Old 08-13-2006, 12:50 AM   #6 (permalink)
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Although the 540 is a little different from my car 528 I couldn't find magnaflow cats that would work with the O2 sensors before and aft so I bought a direct bolt on system.

Let us know what you get!
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