Catted downpipes problems with dealer?
Senior Member
Joined: Nov 2015
Posts: 251
Likes: 19
From: Hawaii
2014 E63 AMG S 4MATIC
They would have to prove that the catted downpipes caused the issue. I know mine don't care much for an exhaust. It's engine work and modifying the ECU that'll get your warranty denied.
Junior Member
Joined: Jun 2016
Posts: 56
Likes: 2
2014 CLS63 AMG S
IMO the acoustic change is really not that appreciable to warrant the exorbitant cost of high flow cat downpipes. Even no-cat downpipes don't sound that much better IMO.
MBWorld Fanatic!
Joined: Jun 2006
Posts: 6,649
Likes: 207
'03 E55, Range Rover Sport Supercharged, Ducati 748R
Yep and I'm not sure that you can do catted downpipes (presumably you mean HFC or high flow cat DPs) without an ECU tune. I really don't know why you would anyway since even DEcatted downpipes have shown hardly any gain over a tune alone - catted downpipes with a tune would show even less gain, and catted DPs withOUT a tune would presumably have little to no (10-15hp at the very best?) effect.
IMO the acoustic change is really not that appreciable to warrant the exorbitant cost of high flow cat downpipes. Even no-cat downpipes don't sound that much better IMO.
IMO the acoustic change is really not that appreciable to warrant the exorbitant cost of high flow cat downpipes. Even no-cat downpipes don't sound that much better IMO.
Junior Member
Joined: Jun 2016
Posts: 56
Likes: 2
2014 CLS63 AMG S
That's good to know, I have only watched videos which is the basis for my opinion. I'm yet to hear one in person, although I'm sure that sounds much different. How would you compare the sound of high flow catted downpipes to catless downpipes? Have you heard both in person?
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MBWorld Fanatic!
Joined: Jun 2006
Posts: 6,649
Likes: 207
'03 E55, Range Rover Sport Supercharged, Ducati 748R
That's good to know, I have only watched videos which is the basis for my opinion. I'm yet to hear one in person, although I'm sure that sounds much different. How would you compare the sound of high flow catted downpipes to catless downpipes? Have you heard both in person?
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Senior Member
Joined: Nov 2015
Posts: 251
Likes: 19
From: Hawaii
2014 E63 AMG S 4MATIC
You get much more noise and more hp with catless downpipes but I think you'll throw a cel without a tune. Without a tune in general your gains won't be as much. If you get high flow cats you won't throw a cel but your car won't be as loud as the catless downpipes. There will be an increase in sound regardless of which one you get but the catless one will yield the loudest sound and biggest gains.
Senior Member
Joined: Sep 2010
Posts: 457
Likes: 17
From: California
e63s edition 1
My dealer refused to deal with my cars issues because I had installed an in car Passport Radar system. even after the fact that i bought 5 brand new AMGs over the pst 8 years from them. yea needless to say. it will be my last AMG hmm EVER,
Super Member
Joined: Mar 2015
Posts: 663
Likes: 49
From: Bucks Cty, PA
2015 gl450
If the car is under warranty, they can't deny all warranty work.
Downpipes give them an out on a whole lot of pricey warranty work though,
