Downpipes with 300 Cats
Thread Starter
Junior Member
Joined: Apr 2017
Posts: 42
Likes: 0
From: London
Mercedes C63s
Downpipes with 300 Cats
Trying to get an aftermarket exhaust for the car but really can’t find any apart from the AWE switchpath which is on a really long wait time!
if I got some custom downpipes from “Mike” and asked him to weld some 300 CEL cats in, would that still throw an emissions light or upset the fuel balance etc? I want to try and avoid a tune... ideally I could get the originals cut throw Mikes custom DP’s in there and carry on as normal, simple and no tune... any drawbacks?
if I got some custom downpipes from “Mike” and asked him to weld some 300 CEL cats in, would that still throw an emissions light or upset the fuel balance etc? I want to try and avoid a tune... ideally I could get the originals cut throw Mikes custom DP’s in there and carry on as normal, simple and no tune... any drawbacks?
Super Member
Joined: Mar 2016
Posts: 908
Likes: 121
C63S
Trying to get an aftermarket exhaust for the car but really can’t find any apart from the AWE switchpath which is on a really long wait time!
if I got some custom downpipes from “Mike” and asked him to weld some 300 CEL cats in, would that still throw an emissions light or upset the fuel balance etc? I want to try and avoid a tune... ideally I could get the originals cut throw Mikes custom DP’s in there and carry on as normal, simple and no tune... any drawbacks?
if I got some custom downpipes from “Mike” and asked him to weld some 300 CEL cats in, would that still throw an emissions light or upset the fuel balance etc? I want to try and avoid a tune... ideally I could get the originals cut throw Mikes custom DP’s in there and carry on as normal, simple and no tune... any drawbacks?
I had mine ceramic heat coated inside and out to reduce engine bay temps.
Just something to consider before fitting.
Member
Joined: Jun 2016
Posts: 238
Likes: 23
From: Florida
2017 C63S Coupe 2018 Ford Raptor 2017 Corvette Z06 2013 Mercedes C63 2012 Mercedes C63 BS
Honestly I think its a waist to do 300 cel cats. Just go catless, I am running catless downpipe with no tune and not throwing a CEL
Member
Joined: Apr 2018
Posts: 126
Likes: 16
From: Fort Lauderdale FL
2018 AMG GTC Roadster. 2013 SL65 2018 GLC63
Trying to get an aftermarket exhaust for the car but really can’t find any apart from the AWE switchpath which is on a really long wait time!
if I got some custom downpipes from “Mike” and asked him to weld some 300 CEL cats in, would that still throw an emissions light or upset the fuel balance etc? I want to try and avoid a tune... ideally I could get the originals cut throw Mikes custom DP’s in there and carry on as normal, simple and no tune... any drawbacks?
if I got some custom downpipes from “Mike” and asked him to weld some 300 CEL cats in, would that still throw an emissions light or upset the fuel balance etc? I want to try and avoid a tune... ideally I could get the originals cut throw Mikes custom DP’s in there and carry on as normal, simple and no tune... any drawbacks?
MBWorld Fanatic!
Joined: Dec 2012
Posts: 1,537
Likes: 372
From: Austin, TX
2017 Porsche 911 C4
I'd get 100 or 200 cell cats instead. You'll still see some increased gains, and it will still sound way better than raspy, smelly catless setups. Keep in mind, catless downpipes only make 20-30 HP at the crank on this car with stock turbos. So who cares if you only make 15 HP with downpipes with high flow cats? 99% of people who do DP's are doing it for the sound anyway, and high flow catted DP's sound WAY better than catless.
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Member
Joined: Jun 2016
Posts: 238
Likes: 23
From: Florida
2017 C63S Coupe 2018 Ford Raptor 2017 Corvette Z06 2013 Mercedes C63 2012 Mercedes C63 BS
I'd get 100 or 200 cell cats instead. You'll still see some increased gains, and it will still sound way better than raspy, smelly catless setups. Keep in mind, catless downpipes only make 20-30 HP at the crank on this car with stock turbos. So who cares if you only make 15 HP with downpipes with high flow cats? 99% of people who do DP's are doing it for the sound anyway, and high flow catted DP's sound WAY better than catless.
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