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      08-17-2018, 10:10 AM   #3
srbarnes4ever
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Drives: 07 335i E90 Sport
Join Date: May 2014
Location: Lexington Ky

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Quote:
Originally Posted by Nexus313 View Post
do the before cats..
Eventually you might misfire/ run rich..
after cats are not that big of a deal
Thanks, they look fairly complex in terms of DIY.....is that a fact, from those who have replaced them? If I were to set aside some time for first attempt, what would I need to expect...I'll search, as I also recall some chatter about a unique tool being required.
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07 335 E90 - MHD Stage 2+FMIC (Black)
11 X5 - MHD Stage 1+FMIC (Sapphire Black Metallic)
20 M340i X-Drive (Alpine White)
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