High flow intakes can cause issues when not tuned?
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Joined: Dec 2019
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From: Florida
AMG C63s
High flow intakes can cause issues when not tuned?
I have a quick question. My car is in for B1 service. I removed my tune but kept the high flow K&N filters in (will be replaced with open cone soon). The technician pointed out that they have seen issues in the past with customers using these high flow filters but no tune that it has caused melted pistons 
.. but then said if car is tuned it should be fine. I asked to explain some more how some more air can damage a none tuned car...but wonder if anybody has every heard such a thing. Seems BS to me...
.. but then said if car is tuned it should be fine. I asked to explain some more how some more air can damage a none tuned car...but wonder if anybody has every heard such a thing. Seems BS to me...
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Joined: Mar 2020
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From: Massachusetts
2020 s63 amg............2018 e63s amg w213............2017 C63s Coupe W205
I have a quick question. My car is in for B1 service. I removed my tune but kept the high flow K&N filters in (will be replaced with open cone soon). The technician pointed out that they have seen issues in the past with customers using these high flow filters but no tune that it has caused melted pistons .. but then said if car is tuned it should be fine. I asked to explain some more how some more air can damage a none tuned car...but wonder if anybody has every heard such a thing. Seems BS to me...
.. but then said if car is tuned it should be fine. I asked to explain some more how some more air can damage a none tuned car...but wonder if anybody has every heard such a thing. Seems BS to me...
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⏱️ 700HP Facelift converted C63 S Coupe with Drexler 3.06 plated LSD
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From: Austin, TX
2017 Porsche 911 C4
Drop-in filters with the OEM box? Yea no, that’s not gonna do a thing. When I had my large B service done, they removed my BMC drop-ins and replaced with new OEM paper filters - they put the BMC’s in a box in the trunk (they know they‘re valuable and reusable). No questions asked, they just did everything they needed for service (oil change, trans flush, etc.).
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From: Florida
AMG C63s
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Joined: Nov 2004
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2005 E55
The tech is 100% right. Oiled filters on cars do cause problems down the road. The oil coats the maf sensors and throws your fuel trims off.
Not sure if our cars use maf sensors or only map sensors but the tech is right.
Nobody uses k&ns on the 6.2 c63 because of this .
Not sure if our cars use maf sensors or only map sensors but the tech is right.
Nobody uses k&ns on the 6.2 c63 because of this .
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From: Flat Earth
AMG C63s Sedan , AMG C43 , AMG G63 , GLK 250
Thread Starter
MBWorld Fanatic!
Joined: Dec 2019
Posts: 1,511
Likes: 424
From: Florida
AMG C63s
The tech is 100% right. Oiled filters on cars do cause problems down the road. The oil coats the maf sensors and throws your fuel trims off.
Not sure if our cars use maf sensors or only map sensors but the tech is right.
Nobody uses k&ns on the 6.2 c63 because of this .
Not sure if our cars use maf sensors or only map sensors but the tech is right.
Nobody uses k&ns on the 6.2 c63 because of this .
Senior Member
Joined: Jun 2019
Posts: 453
Likes: 91
From: DFW, Texas
2017 AMG C63
It always amazes me how master technicians who are ASE certified and can tell you about how any oem mechanical system works on the car, can be so clueless when it comes to after market and performance aspects. Just because they know the car/engine does not mean they have a clue when talking about tunes, filters in this case, etc.
Most technicians nowadays do not have to be good at analysis, they just run scans and do what the machine and computer tells them.
You should be 100% fine running filters on a factory tune.
Most technicians nowadays do not have to be good at analysis, they just run scans and do what the machine and computer tells them.
You should be 100% fine running filters on a factory tune.
Senior Member
Joined: Jun 2019
Posts: 453
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From: DFW, Texas
2017 AMG C63
