Catted DP’s installed on 2020 C63 Coupe
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Joined: Dec 2020
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2020 C63S Sedan
This is how the clip looks like below. In all honesty, I'm not convinced yet, just looking into it, doesn't seem too bad but I still feel like I don't want to **** with wiring just yet.
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Joined: Dec 2019
Posts: 334
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From: Texas
W205 C63
We have catted downpipes in stock and ready to ship! These are heavily discounted for the remainder of 2020. Any order placed before midnight Dec 22nd will ship out this year, all others will ship out Jan 4th 2021.
https://modalwork.com/collections/ex...ance-downpipes
https://modalwork.com/collections/ex...ance-downpipes
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Joined: Nov 2016
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From: Toronto, ON
2021 Mercedes C63s AMG Coupe
We have catted downpipes in stock and ready to ship! These are heavily discounted for the remainder of 2020. Any order placed before midnight Dec 22nd will ship out this year, all others will ship out Jan 4th 2021.
https://modalwork.com/collections/ex...ance-downpipes
https://modalwork.com/collections/ex...ance-downpipes
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2019 C43
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From: Brooklyn, NY
2018 GT R; G82; M340
I have catted dp on my 19 fl, the shop couldn’t fit the Big Daddy spacers so I’m running with CEL ON for now which is very annoying. Not sure where to source 90 degree adapter though
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2019 C43
http://bigdaddiesgarage.com/angled-cel-fix.html
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Joined: Apr 2021
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From: New Braunfels, TX
2020 C63 Coupe
How is everyones modal works downpipes holding up? Issues/Lights still all good? Looking at getting a similar set.
It looks like victory road performance is using a similar supplier.
https://www.vrpspeed.com/product/w20...ded-downpipes/
modal work is no longer selling the catted/shielded version of their pipes. A few remaining de-cat downpipes are all they have left and then they wont be selling them anymore.
It looks like victory road performance is using a similar supplier.
https://www.vrpspeed.com/product/w20...ded-downpipes/
modal work is no longer selling the catted/shielded version of their pipes. A few remaining de-cat downpipes are all they have left and then they wont be selling them anymore.
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Thread Starter
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Joined: Jan 2016
Posts: 385
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From: ATL
2020 C63S Coupe, 2021 Bmw X5M Competition
Mine have been pretty good but I only drove like 4k miles last year. Working from home full time. Smell is a bit more than I’d like. I would’ve changed them for better Cats if I was keeping the car. Selling the car in February.
Last edited by elitex; Aug 15, 2021 at 11:23 PM.
Senior Member
Joined: Dec 2010
Posts: 306
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From: Earth
C63S, 2004 S4, 2001 S4 Avant
Modal catted/shielded DP and intake, no tune, spacers. After spacers, only had CEL three times. Once was a weird coincidence when TPM sensor showed low tire pressure on a cold day same, both came on the same time and went away when added air to tires. The 2nd and 3rd times were after track days.
Any information why Modal is dropping the heat shielded and catted DP?
Any information why Modal is dropping the heat shielded and catted DP?
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Joined: Apr 2016
Posts: 1,202
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From: Brooklyn, NY
2018 GT R; G82; M340
Modal catted/shielded DP and intake, no tune, spacers. After spacers, only had CEL three times. Once was a weird coincidence when TPM sensor showed low tire pressure on a cold day same, both came on the same time and went away when added air to tires. The 2nd and 3rd times were after track days.
Any information why Modal is dropping the heat shielded and catted DP?
Any information why Modal is dropping the heat shielded and catted DP?
Senior Member
Joined: Dec 2010
Posts: 306
Likes: 27
From: Earth
C63S, 2004 S4, 2001 S4 Avant
They were the Big Daddy spacers - I don't have the link but it was mentioned either here or another thread about the catted DP.
Regarding the CEL, it is inconsequential as it was temporary after hard track days. I also don't notice any odor, as opposed to my catless S4.
Regarding the CEL, it is inconsequential as it was temporary after hard track days. I also don't notice any odor, as opposed to my catless S4.
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Joined: Jul 2021
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C63S
Do you not need to pass smog? sometimes just bc a CEL is gone doesn't mean all the settings have cleared and are ready/good to go in order to pass.
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Joined: Dec 2010
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From: Earth
C63S, 2004 S4, 2001 S4 Avant
IL does only OBD scan, and only active codes count. For example, I have a Volvo with old cats, and occasionally get CEL. I run Cataclean, CEL goes away and I get the car checked for emissions and passes, but they say that they see old codes. But they are not active.
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C63S
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Joined: Aug 2021
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From: Tigard, Oregon
2019 W205 C63 AMG
Not sure if you bought the DP yet, but I just installed mine (Modal Catted DP) and I do love it. I do have a family and this is my summer daily drive and I keep the car in the garage during rainy and winter seasons. However, I didn't notice much gas smells at all and the sound is not crazy loud. I would say, its about 5-10 percent louder than OEM DP but the performance is epic. quick throttle response and gains are much better than being restricted from the OEM DP. The sound is much quieter then those Honda's with those fart cans. My neighbor has a Civic Type R stock and that exhaust is much noticeable when it drives out from our street. Install was a pain, but I think you can manage that. You will have to remove the steering column, there's no work around. Its easy tho, the steering column is held on by a quick disconnect coupling. Make sure steering wheel and wheel/tires are straight or just use a sharpie to mark an alignment line from the steering column shaft to the quick disconnect. I found that removing the lower bracing will give more room to cut out the old DP's, use a quality saw blade. Took 3 saw blades to cut through the DP. Cut it 3-4 inches above the last cat so you can weld a V-band onto it for later use.
One man job, cost me 5 hours. But if there was a good right up, I can see it taking less than 3 or 2 hours the most. The upper brackets that holds the DP to the engine is the worst part of it all. Everything else was pretty smooth installed. The lower passenger DP seems about 2-3 inches too short, I had to muscle the exhaust, pull it forward to make the connection ( a second person can be helpful here).
2019 C63
Stage 2 ECU flash
ZAC CF intake
Modal 200 cel DP
One man job, cost me 5 hours. But if there was a good right up, I can see it taking less than 3 or 2 hours the most. The upper brackets that holds the DP to the engine is the worst part of it all. Everything else was pretty smooth installed. The lower passenger DP seems about 2-3 inches too short, I had to muscle the exhaust, pull it forward to make the connection ( a second person can be helpful here).
2019 C63
Stage 2 ECU flash
ZAC CF intake
Modal 200 cel DP
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From: Brooklyn, NY
2018 GT R; G82; M340
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From: Earth
C63S, 2004 S4, 2001 S4 Avant
I will be honest, that after a hard track day, I get a catalyst efficiency CEL after about a day. Not sure if all the hard driving affects the exhaust afterwards, but I clear it after about 24 hours and it stays off. I suspect that the tolerances are so tight for the O2 sensors that is you have too much or too little exhaust gas passing by them (or the mini cat cleans too much or too little) that you get a CEL.
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Joined: Apr 2016
Posts: 1,202
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From: Brooklyn, NY
2018 GT R; G82; M340
Do you have Modal catted DP or other brand? Also, did you fit the Big Daddy O2 mini cat, add another angled spacer to the mini cat, or just get the Big Daddy angle O2 simulators in the link above?
I will be honest, that after a hard track day, I get a catalyst efficiency CEL after about a day. Not sure if all the hard driving affects the exhaust afterwards, but I clear it after about 24 hours and it stays off. I suspect that the tolerances are so tight for the O2 sensors that is you have too much or too little exhaust gas passing by them (or the mini cat cleans too much or too little) that you get a CEL.
I will be honest, that after a hard track day, I get a catalyst efficiency CEL after about a day. Not sure if all the hard driving affects the exhaust afterwards, but I clear it after about 24 hours and it stays off. I suspect that the tolerances are so tight for the O2 sensors that is you have too much or too little exhaust gas passing by them (or the mini cat cleans too much or too little) that you get a CEL.
Senior Member
Joined: Dec 2010
Posts: 306
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From: Earth
C63S, 2004 S4, 2001 S4 Avant
I purchased the Modal catted DP early, and they worked with me thoroughly to find a solution to the CEL, from recommending the specific items for the CEL, to troubleshooting the tight O2 sensor installation and providing me with several solutions, and following up consistently. Most of the reason why C63 owner go for the catted DP is to avoid this situation without a tune (which easily could void any powertrain warranty even if the tune is only to clear CEL), and more minor consideration is less noise compared to catless DP (if you worry about too much noise, get a Tesla).
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C63s AMG
I just had my catted downpipes installed Monday, and I couldn't be happier, the exhaust sound is perfect, I'm all smiles driving it. No popcorn pop and crackles, it sounds OEM, just louder with pronounced and sophisticated sound.
I purchased 90 deg mini cats from big daddies garage but they did not fit, might be because I have PFL. I ordered a set of straight spacers, will report on fitment soon.
So far without spacers, I do not have any CEL yet, not sure why but I'll take it.
I purchased 90 deg mini cats from big daddies garage but they did not fit, might be because I have PFL. I ordered a set of straight spacers, will report on fitment soon.
So far without spacers, I do not have any CEL yet, not sure why but I'll take it.
