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7 Series - F01 / F02 (2009 - 2015)
The 5th generation F01/F02 BMW 7 Series flagship forum. The redesigned 7 series leads off the BMW Fxx chassis code, offering an 8 speed automatic transmission and all turbocharged engine options.

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Old 05-17-2016, 02:48 PM
Terrellford12 Terrellford12 is offline
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Location: Louisiana
Join Date: Sep 2010
Posts: 9
Mein Auto: BMW 750Li and Camaro SS
Anybody Cut Cats off yet

Hello has anyone cut there catalytic converter off yet.? I'm asking because mine is clogged up.
"The Ultimate Driving Machine"
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Old 05-17-2016, 05:11 PM
Rdsii Rdsii is offline
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Location: NJ
Join Date: Mar 2013
Posts: 139
Mein Auto: 2013 750i x Msport, B&O,
the easy part is knocking the honeycomb ceramic out or buy bypass pipe. What do you do about the O2 sensors after the cats. They will throw codes so you need a way of turning them off.
2013 BMW 750ix, Msport, B&O, ceramic, BMW Apps
2012 BMW 650ix retired
2010 jeep wrangler
2010 Infiniti FX
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Old 05-17-2016, 05:49 PM
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wjjklj wjjklj is offline
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Location: Louisville, Kentucky USA
Join Date: Dec 2008
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Mein Auto: 2013 BMW 750Li X-Drive
I'm not 100% on the 7 series being this way but most newer BMW's have primary cats coming just behind the turbos and these have the O2 sensors. There are usually secondary cats before the rear mufflers. If you delete the secondary cats the exhaust will sound more aggressive and still pass emissions. This is the way the E90 3 series are set up....again I'm not 100% on this. Check out realoem for the answer.
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Old 05-18-2016, 07:10 AM
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Din Din is online now
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Location: Texas
Join Date: Feb 2006
Posts: 1,278
Mein Auto: 750LI M3 Mustang Tundra
if its the F01/f02 with less than 80k miles you can get the federal emiisions warranty to get them replaced.
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