Does anyone know the cell count of the OEM Catalytic converters
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Senior Member
Joined: Sep 2011
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From: CA
E63 M157
Does anyone know the cell count of the OEM Catalytic converters
As title states, does anyone happen to know the cell count of the OEM Cats on our M157's? I assume it is fairly restrictive since we only have 2 primary cats while most cars have 2 primaries along with 2 secondary cats.
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2015 E400 Sedan
number of holes will not let you know how restrictive.
flow test could where you measure pressure before and after for known amount of air to compare to some other cat design for car.
But for most part manufacturers have pretty good flowing cats as they know Less restrictive means better MPG and reduced emissions.
Ps everything I own and seen has 1 cat per bank of engine close to engine w/o2 sensor before and after...
Where do you see secondary?
Exhaust Components for 2018 Mercedes-Benz E 63 AMG® S | MB OEM Parts
flow test could where you measure pressure before and after for known amount of air to compare to some other cat design for car.
But for most part manufacturers have pretty good flowing cats as they know Less restrictive means better MPG and reduced emissions.
Ps everything I own and seen has 1 cat per bank of engine close to engine w/o2 sensor before and after...
Where do you see secondary?
Exhaust Components for 2018 Mercedes-Benz E 63 AMG® S | MB OEM Parts
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Joined: Feb 2015
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2019 911 GTS / 2016 X3 / 2015 E63s / 1993 RX-7
number of holes will not let you know how restrictive.
flow test could where you measure pressure before and after for known amount of air to compare to some other cat design for car.
But for most part manufacturers have pretty good flowing cats as they know Less restrictive means better MPG and reduced emissions.
Ps everything I own and seen has 1 cat per bank of engine close to engine w/o2 sensor before and after...
Where do you see secondary?
Exhaust Components for 2018 Mercedes-Benz E 63 AMG® S | MB OEM Parts
flow test could where you measure pressure before and after for known amount of air to compare to some other cat design for car.
But for most part manufacturers have pretty good flowing cats as they know Less restrictive means better MPG and reduced emissions.
Ps everything I own and seen has 1 cat per bank of engine close to engine w/o2 sensor before and after...
Where do you see secondary?
Exhaust Components for 2018 Mercedes-Benz E 63 AMG® S | MB OEM Parts
Just adding a HFC (200 cell count for example) will definitely make things louder, but ultimate performance will be gained with some testing (various inlet/outlet shapes/lengths/diameters.... hopefully from the exhaust builder/seller) to choose the proper size convertor for a specific application.
There is a huge incentive to make the car as efficient as possible, but for people seeking HUGE power, the cats always are restrictive whether they are 200 or 100 count.
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From: ATL
2017 GLS 550
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Ps everything I own and seen has 1 cat per bank of engine close to engine w/o2 sensor before and after...
Where do you see secondary?
Exhaust Components for 2018 Mercedes-Benz E 63 AMG® S | MB OEM Parts
Ps everything I own and seen has 1 cat per bank of engine close to engine w/o2 sensor before and after...
Where do you see secondary?
Exhaust Components for 2018 Mercedes-Benz E 63 AMG® S | MB OEM Parts
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Thread Starter
Senior Member
Joined: Sep 2011
Posts: 302
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From: CA
E63 M157
Great info everyone! Thanks
Yes you're correct. Upon further inspection of the OEM cats (those things are massive), I can see where it divides. You wouldn't happen to know the cell count of the OEM cats would you?
Yes you're correct. Upon further inspection of the OEM cats (those things are massive), I can see where it divides. You wouldn't happen to know the cell count of the OEM cats would you?
