Catted Downpipe
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2019 AMG C63s Coupe
Catted Downpipe
Hey guys.
I just got some catted downpipes with 130mm HJS 200cpsi cats installed on my 2019 C63s. The exhaust is louder, but loud enough for my liking. Will the exhaust get a little bit louder over time ie: does the dp & cats have to "break in"? Or will the volume stay the same? I also have a awe catback and EVM coming. Will this improve the volume a lot more or will it be minimal?
I'm trying to stay away from catless because of the smell.
I just got some catted downpipes with 130mm HJS 200cpsi cats installed on my 2019 C63s. The exhaust is louder, but loud enough for my liking. Will the exhaust get a little bit louder over time ie: does the dp & cats have to "break in"? Or will the volume stay the same? I also have a awe catback and EVM coming. Will this improve the volume a lot more or will it be minimal?
I'm trying to stay away from catless because of the smell.
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From: Florida
W140 S320
I have the same redstar pipes on my 63. I have the EVM set to always open. Honestly its more than enough volume. Sounds good and calm down low but when you get on it, it gets very loud. No CEL, no tune needed. Best option for these cars if you dont want a tune.
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C450,GLC 63,VW GTI
How long have you had the pipes on ? and did you get the 200 cell HJS cats?
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Joined: Dec 2019
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From: Miami, Florida
W205 C63 AMG Coupe
What are you going to replace them with? If you go catless and you're interested in selling the catted set you currently have, I may be interested.
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Joined: Sep 2019
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2019 C63S Sedan
No cel with the redstar hjs catted downpipes? Do you have o2 spacers fitted?
There was an old thread with a few members saying redstar downpipes with hjs cats threw a cel where as with gesi cats no cel.
There was an old thread with a few members saying redstar downpipes with hjs cats threw a cel where as with gesi cats no cel.
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2019 AMG C63s Coupe
PM me. They will probably be on the car for another 2 weeks until catless come in. They are also heat shielded. But yes I’m interested in selling
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2019 AMG C63s Coupe
I was expecting a CEL because I also read the forum and saw that people were having that issue.
Last edited by Yanzi19; Sep 8, 2023 at 12:27 PM.
Senior Member
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2019 C63S Sedan
Planning on getting redstar downpipes for a while now and just wasn't sure of which cats to go for.
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From: Vancouver, BC
2021 C63S Coupe
What's the going price for install only of downpipes? I don't care to save the old ones so the cutting method is fine for me
I'm in Vancouver Canada if anyone has recommendations for a decent so I'd appreciate
Thanks
QUOTE=Sazabi;8843033]I have a set of catted modalwork downpipes coming in soon, I already have a EVM, ill record the difference between them.[/QUOTE]
I'm in Vancouver Canada if anyone has recommendations for a decent so I'd appreciate
Thanks
QUOTE=Sazabi;8843033]I have a set of catted modalwork downpipes coming in soon, I already have a EVM, ill record the difference between them.[/QUOTE]
Thread Starter
Junior Member
Joined: Aug 2023
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2019 AMG C63s Coupe
What's the going price for install only of downpipes? I don't care to save the old ones so the cutting method is fine for me
I'm in Vancouver Canada if anyone has recommendations for a decent so I'd appreciate
Thanks
QUOTE=Sazabi;8843033]I have a set of catted modalwork downpipes coming in soon, I already have a EVM, ill record the difference between them.
I'm in Vancouver Canada if anyone has recommendations for a decent so I'd appreciate
Thanks
QUOTE=Sazabi;8843033]I have a set of catted modalwork downpipes coming in soon, I already have a EVM, ill record the difference between them.
I installed the downpipes myself. I cut the OEM.
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2019 AMG C63s Coupe
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2019 C63s
I bought the Modal Works catted downpipes, loud but not terribly loud but definitely a lot louder than stock. With the car in comfort and the evm off it basically sounds stock, evm on and sport plus makes it sound like a different car.
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From: Miami, Florida
W205 C63 AMG Coupe
It's likely a code being brought on by the lower quality catalytic converters in the downpipes you put on if you didn't have that tuneed out. I have not seen any reports of the catted option from that company not end up resulting in throwing a code.
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2019 AMG C63s Coupe
it could be a quality issue. It could also be that modalworks uses a smaller 200 cats than the Redstar. That probably why it is louder as well. Going 130 mm instead of 121 was a mistake
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2019 C63s
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From: Florida
W140 S320
On the facelift the HJS 130 option is pretty much not going to cause a CEL. The HJS 121 option might cause a CEL on the facelift. This is info directly from redstar. As far as cats causing CELs, not all cats are made the same. HJS is a known supplier for a few OEMs. Their cats are EURO 6 rated which means they will not cause a CEL as long as they are used in the right application. The washcoat on the HJS cats is what allows them to be 200 cell and still be euro 6 certified. This makes them more costly to produce of course. The modal works cats are just Chinese low quality cats and thats why those pipes are so much cheaper. I have the redstar 130 hjs cats on my 63 and the build quality is second to none. Made in Russia as opposed to the modalworks which are made in china.
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C450,GLC 63,VW GTI
On the facelift the HJS 130 option is pretty much not going to cause a CEL. The HJS 121 option might cause a CEL on the facelift. This is info directly from redstar. As far as cats causing CELs, not all cats are made the same. HJS is a known supplier for a few OEMs. Their cats are EURO 6 rated which means they will not cause a CEL as long as they are used in the right application. The washcoat on the HJS cats is what allows them to be 200 cell and still be euro 6 certified. This makes them more costly to produce of course. The modal works cats are just Chinese low quality cats and thats why those pipes are so much cheaper. I have the redstar 130 hjs cats on my 63 and the build quality is second to none. Made in Russia as opposed to the modalworks which are made in china.
Member
Joined: Aug 2019
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From: Florida
W140 S320
