Retrofit rear amg performance mufflers(u78) on sports exhaust(u21)

Nov 7, 2024 | 07:35 PM

Maxmuscle21

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Retrofit rear amg performance mufflers(u78) on sports exhaust(u21)

Hey guys i have c43 amg facelift 2019, unfortunately my car came with sports exhaust (u21) no the performance (u78) , i can find brand new mufflers of u78 , is it possible these mufflers replace the sports one and dont make any other change on sports exhaust? If i do this rennetech module will work to open and close valves when i want ? Help please

Nov 7, 2024 | 08:30 PM

W205C43PFL

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Quote:

Originally Posted by Maxmuscle21

I understand this thread is for the pre-facelift but great read nonetheless: https://mbworld.org/forums/c450-c43-...-complete.html

Nov 7, 2024 | 08:42 PM

Maxmuscle21

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Quote:

Originally Posted by W205C43PFL;[url=tel:9061595

9061595]I understand this thread is for the pre-facelift but great read nonetheless: https://mbworld.org/forums/c450-c43-...-complete.html

i already readed this topic but got even more confused by it , help please im lost so if i put amg performance mufflers on u21 exhaust ll not work? Need full system amg exhaust? I ve the 2019 facelift

https://youtu.be/OTgQatsF9u4?si=rz8J9R-EGC5Fr5i7

these guys seems doing retrofit u78 mufflers and works on u21 , can anyone answer me please if ll work so i buy u78 mufflers?

Last edited by Maxmuscle21; Nov 7, 2024 at 08:53 PM.

Nov 8, 2024 | 08:53 AM

W205C43PFL

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Quote:

Originally Posted by Maxmuscle21

I do apologize for the confusion, I do believe you need the full PE exhaust system but I love to be wrong.

Nov 8, 2024 | 04:49 PM

Maxmuscle21

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Quote:

Originally Posted by W205C43PFL;[url=tel:9061814

9061814[/url]]I do apologize for the confusion, I do believe you need the full PE exhaust system but I love to be wrong.

thanks a lot for your answer if i go oem and choose fi exhaust you think is possible get limp mode when valves fully open ? How i can guarantee ll not ve problems after installation ?

Nov 8, 2024 | 05:20 PM

W205C43PFL

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Quote:

Originally Posted by Maxmuscle21

thanks a lot for your answer if i go oem and choose fi exhaust you think is possible get limp mode when valves fully open ? How i can guarantee ll not ve problems after installation ?

You're welcome : ) I am sorry and I want to admit I don't have much experience with aftermarket exhausts, so I am not sure how to help and I don't want to give you the wrong information. However, you may ask someone that put a fi exhaust in here for assistance : ) https://mbworld.org/forums/c450-c43-...i-exhaust.html

If you do retrofit the oem performance exhaust however you could probably buy a exhaust valve module to keep the exhaust open all the time without any CEL or codes.

Nov 8, 2024 | 06:06 PM

Maxmuscle21

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Quote:

Originally Posted by W205C43PFL;[url=tel:9062099

9062099[/url]]You're welcome : ) I am sorry and I want to admit I don't have much experience with aftermarket exhausts, so I am not sure how to help and I don't want to give you the wrong information. However, you may ask someone that put a fi exhaust in here for assistance : ) https://mbworld.org/forums/c450-c43-...i-exhaust.html

If you do retrofit the oem performance exhaust however you could probably buy a exhaust valve module to keep the exhaust open all the time without any CEL or codes. https://www.youtube.com/watch?v=wdb1UEcHwRo

thanks a lot for your help ll ask the guys that puted fi also !!