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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

 
 
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Old 05-08-2012, 10:37 PM   #1
jojo12
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Join Date: Jul 2011
Location: VA
Posts: 209
My Ride: 330xi
XI aftermarket catalytic converters??

Calling all XI'ers with aftermarket headers and/or catalytic converters! I'm dying to upgrade my headers and free up some horsepower but running cat-less is not an option due to emissions testing (and a more general respect for the environment).

Does anyone have aftermarket cats, and if so, can you give details as to brand, type, size dimensions, etc? I want to ensure that the cats I get will play nice with the XI's 'special' exhaust setup. I've heard one can use the section one midpipe/catalytic converters from European SULEV e46s but haven't seen if they'll work w/ the XIs (and I haven't been able to source them).

Otherwise, I'm pretty much at square one, only knowing that the pipe diameter is 2.5"... Any help is greatly appreciated, I'm eager to get the cat issue straightened out so I can move ahead w/ the upgrade.
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