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BMW 3-Series (E90 E92) Forum
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Catted Downpipe Question
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| 04-22-2013, 11:54 AM | #1 |
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SoFlo_BD
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Catted Downpipe Question
Hello all,
I recently blew my cat on the downpipes and am looking into replacing them.. I really do not want the headache of emissions issues with catless and plus with my exhaust setup (hpf gen 2) I feel catless will just be obnoxiously loud. My question is if I blew my stock cat with the hpf exhaust, if i get high flow catted downpipes will i just keep blowing cats or will the high flow be able to handle the backpressure better than stock? |
| 04-22-2013, 05:38 PM | #2 |
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Second Lieutenant
 
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what happen to the cats....they broke in pieces and got out the exhaust ?
--- and yes high flow cat will handle better backpressure because the are steel cats versus ceramic ( stock )
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2007 335i coupe AT-- I80AS--FBO -stock turbos--COBB v402 beta stage 2 + ATR-- NITTO'S 275-40-17 NT05R --- 12.025 @ 120 mph -- full weight
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| 04-23-2013, 07:53 PM | #3 | |
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SoFlo_BD
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Quote:
No did not blow out of the exhaust, and thanks for thr help that makes me feel better  |
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| 04-23-2013, 08:33 PM | #4 |
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Brigadier General
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High flow catted may not show emissions codes when you fist install but eventually it will happen and you will have to run a very mild sim to pass odbII emissions inspection.
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