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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > n00b question: e90 OEM exhaust cat and resonator delete



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      11-03-2010, 02:29 PM   #1
jahmed78
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n00b question: e90 OEM exhaust cat and resonator delete

I am trying to decide what to do about my exhaust. Here are my initial questions so I can make a better decision:

1. The primary cats are in the OEM downpipes, correct?
2. Where are the secondary cats? In the OEM midpipe?
3. Where is the resonator? What are the consequences of removing the resonator?
4. My first exhaust mod is probably going to be an AR Design catless DP. Later I may get a Bastuck cat-back exhaust. Can I keep a stock midpipe?

Thanks for your help in advance!
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2007 335i e90 - black on black w/wood trim and iDrive

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      11-03-2010, 02:35 PM   #2
jahmed78
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bump n grind
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2007 335i e90 - black on black w/wood trim and iDrive

19" BMW M-Performance wheels, ST coilovers, m3 rep front bumper and skirts, CF Hamann rep diffuser, Remus Race quad exhaust, aFe DCI, LED angel eyes & DRL kit,
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