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W210 AMG Discuss the W210 AMG's such as the E50, E55, and E60

Cat Help...

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Old Jul 25, 2009 | 11:25 PM
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1999 Mercedes E55
Cat Help...
I Might Have Posted This Twice, But Her Goes Again...

You Guys Helped Me Out With Some Aftermarket Cat Replacments... (Replace with a nice set of 300-cell metal core cats and you will be set all for under $300 installed), But When I Went To Purchase Them, The Guy Stated He Needed To Know The Size I Needed...

Does Anyone Know The Opening Size For The 1999 Mercedes E55 Amg, Or All The Stats I Need To Order These Cat Replacements...

Thanks Again.
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Old Jul 26, 2009 | 12:24 AM
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W210 E55 AMG
If I'm not mistaken, it's 2.5 inches inlet/outlet.
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Old Jul 26, 2009 | 01:57 AM
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1999 Mercedes E55
Thanks..
Thanks, Everyone Is Telling me It's 2 1/4... I'm Still Triple Checking Though.
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Old Jul 26, 2009 | 02:04 AM
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W210 E55, W211 E3504M, E90 325i
Stock is 2.25 but 2.5 works well as well. Any good exhaust shop will be able to make the pieces work (sleeved welds (?))

Does the ebay vendor have the cats back in stock?
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Old Jul 26, 2009 | 03:19 AM
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1999 Mercedes E55
I Don't Know, That's Why He Needed The Size. Which One Do You Think Is The Best. I Want To Stay As Close To Stock As Possible, With No "Long Term" Issues.
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Old Jul 26, 2009 | 03:14 PM
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2.5" will do fine. stock outer diameter is 2.35" roughly so its .15" gap that they can easily fill in with the mig weld.
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Old Jul 26, 2009 | 07:43 PM
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E55
Front cats or secondaries?
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Old Jul 26, 2009 | 11:42 PM
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secondaries, front cat piping is even smaller, its roughly 2.0" OD inlet and I believe 2.25" outlet (I'd have to double check but that's about right).
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Old Jul 27, 2009 | 01:39 AM
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E55
Originally Posted by AMS Performance
secondaries, front cat piping is even smaller, its roughly 2.0" OD inlet and I believe 2.25" outlet (I'd have to double check but that's about right).
Where can I find aftermarket FRONT cats for our cars?
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Old Jul 27, 2009 | 04:55 AM
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W210 E55 AMG
You can try Fast Intentions H.F.C. 300 cell metallic cats.
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