When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I hear what you're saying. So, it's 20HP and sound. That's about $1,000/10HP. My 2020 needs no enhancement to it's exhaust. Got all the burble I can stand. As far as the 20HP, that translates to 4% increase over stock. I'll take the same coin and spend it somewhere else. But, I will confess I was there once (maybe twice) in my youth. Maybe three times; but no more....
Ya ive heard/seen alot more than 5hp, closer to 15-25 whp w/o a tune, but with a tune they allow you to do stage 2, so a much bigger gain.
Alot of it has to do with the sound though, major sound improvement.
its similar for most cars. Adding Motordyne ART pipes was one of the largest easy/cheap power gains for the G37 or 370Z. Cats are hella restricting and we have 2 that get eliminated.
@elitex so you currently still have a CEL ? No limp mode or anything though I hope?
I hear what you're saying. So, it's 20HP and sound. That's about $1,000/10HP. My 2020 needs no enhancement to it's exhaust. Got all the burble I can stand. As far as the 20HP, that translates to 4% increase over stock. I'll take the same coin and spend it somewhere else. But, I will confess I was there once (maybe twice) in my youth. Maybe three times; but no more....
Like another poster said, this car doesn’t make sense at all. we buy it for various reasons. I know people with a lot more money than I have that just can’t imagine spending the kind of money I have on cars over the years.
Everyone spends their money differently. My buddy lost few hundred grand gambling in one night, I will have a heart attack if that happened to me.
Like another poster said, this car doesn’t make sense at all. we buy it for various reasons. I know people with a lot more money than I have that just can’t imagine spending the kind of money I have on cars over the years.
Everyone spends their money differently. My buddy lost few hundred grand gambling in one night, I will have a heart attack if that happened to me.
Hey did you sort out your CEL issue? My 2020 C63s got a CEL for cat inefficiency even with HJS 200 cell Euro 6 catted downpipes. I'm getting spacers installed soon which should fix it.
Hey did you sort out your CEL issue? My 2020 C63s got a CEL for cat inefficiency even with HJS 200 cell Euro 6 catted downpipes. I'm getting spacers installed soon which should fix it.
So I did install the spacers that Modal works sent me and I haven’t seen a CEL yet but I do see pending codes. Looks like this spacer is too big also. I am going to try these next.
So I did install the spacers that Modal works sent me and I haven’t seen a CEL yet but I do see pending codes. Looks like this spacer is too big also. I am going to try these next.
Good to know, I was considering using the bigger o2 sensor restrictor from Fabspeed, the one with a small built in cat but I'll try the smaller one Red Star is sending me. I was surprised too and I think you're right, MB is making their cars more and more sensitive and strict. I did some research and I found out that the way the dps are built and the position of where the o2 sensor attachments are placed on the dps makes a difference whether or not you get a CEL with HJS 200 cats or not. Fabspeed and Renntech both apparently redesigned some of their dps to fix this issue. So it could be that for the Red Star dps.
Here are my Red Star HJS 200 cell dps with heat shielding:
Last edited by BrianShaw23; Jun 24, 2020 at 07:48 PM.
Good to know, I was considering using the bigger o2 sensor restrictor from Fabspeed, the one with a small built in cat but I'll try the smaller one Red Star is sending me. I was surprised too and I think you're right, MB is making their cars more and more sensitive and strict. I did some research and I found out that the way the dps are built and the position of where the o2 sensor attachments are placed on the dps makes a difference whether or not you get a CEL with HJS 200 cats or not. Fabspeed and Renntech both apparently redesigned some of their dps to fix this issue. So it could be that for the Red Star dps.
Here are my Red Star HJS 200 cell dps with heat shielding:
Interesting. They look very well done. How’s the smell? I still say that Catted ones are worth it, just need to figure out the right size spacer.
Interesting. They look very well done. How’s the smell? I still say that Catted ones are worth it, just need to figure out the right size spacer.
There was a smell at first because of the heat shielding needing to burn up but that went away in a day after some fun driving . Otherwise almost no smell at all, I barely notice it even when letting the car warm up in the garage.
Catted dps are way worth it I agree, even for the extra $$. I did bmc filters, catted dps and had the mufflers modified to make it sound more like a "hopped up pre facelift" as the Renntech dealer in Studio City described it. I'll upload vids once the CEL is fixed. Car sounds better than I could've hoped for and the changes really woke up the car performance wise. Comfort mode feels like sport + mode, noticeably less turbo lag especially in comfort mode and it feels noticeably more powerful. Also, I'm noticing better mpg in race mode which is interesting. My mpg doesn't drop as low as before in race mode. Also noticing the engine temp doesn't get as high, runs 10 degrees cooler or so. But yes, blown away at how much potential the facelift actually has, in stock form it's running at probably 60% of its potential compared to after the bmc filters, catted dps and muffler modification. Haven't done my Renntech tune yet either lol.
Last edited by BrianShaw23; Jun 28, 2020 at 06:56 PM.
Hey guys I have a 2018 C63s sedan so that would be pre facelift I believe. But the car currently has a renntech tune on it with bmc filters and a secondary cat delete. Was wanting a little more so I went and ordered the modal works catted downpipes along with a csf heat exchanger to deal with these AZ temps. I am hoping to not see any CEL but I am not sure, will keep you guys posted
Hey guys I have a 2018 C63s sedan so that would be pre facelift I believe. But the car currently has a renntech tune on it with bmc filters and a secondary cat delete. Was wanting a little more so I went and ordered the modal works catted downpipes along with a csf heat exchanger to deal with these AZ temps. I am hoping to not see any CEL but I am not sure, will keep you guys posted
Not an issue since you are tuned. Just have Renntech turn off the rear O2 sensors.
I am not sure if Renntech would do that for me. When I spoke to them on email they told me that I would be fine to install their 200 cell downpipes and shouldnt have an issue, their downpipes are incredibly expensive which led me to modalworks. But I am hoping the tune takes are of any issues that might arise but the answer doesn’t seem to be clear.
Interesting. They look very well done. How’s the smell? I still say that Catted ones are worth it, just need to figure out the right size spacer.
Hey elite, please let me know the results of those mini spacers you're going to try from bigdaddiesgarage. If you get better results from them compared to the ones Modal Works sent you I think I'll buy them as well.
Last edited by BrianShaw23; Jun 26, 2020 at 04:56 PM.
Hey guys just an update on the car, installed rhe catted Downpipes and they are amazing they make the car sound insane with minimal smell. Was good for a couple of days before a Chexk Engine light ended up coming on. Doesn’t put the car in any kind of limp mode just has the light. Have any of you guys solved the issue or is it still an ongoing problem, would really appreciate any help that I can get.
Hey guys just an update on the car, installed rhe catted Downpipes and they are amazing they make the car sound insane with minimal smell. Was good for a couple of days before a Chexk Engine light ended up coming on. Doesn’t put the car in any kind of limp mode just has the light. Have any of you guys solved the issue or is it still an ongoing problem, would really appreciate any help that I can get.
Which catted DP's you go with? I have the modalworks and plan on installing in 2 weeks so would be nice to have the parts needed to take care of any potential issues right off the batt. Can anyone chime in?
I have more bad news today that I would appreciate any insight on today. The original code that the car threw was a PO420 but the performance of the car was unaffected still pulled great. Today however while just getting on the gas the check engine started flashing at me and I could feel misfires. The code is now PO430, do any of you guys have any experience with this issue?
I have more bad news today that I would appreciate any insight on today. The original code that the car threw was a PO420 but the performance of the car was unaffected still pulled great. Today however while just getting on the gas the check engine started flashing at me and I could feel misfires. The code is now PO430, do any of you guys have any experience with this issue?
Sorry to hear, please keep us posted. I will have an 8hr trip home right after install. Would not be fun to get stranded on the side of the road.
Did a little digging around and it turned out that it wasn’t throwing one code it was multiple, PO420 and PO430 are being caused by the downpipes. But as to the aforementioned misfire I believe the car has done it in the past but this is the first time I have ever plugged a scanner into the car and saw a PO308 misfire on cylinder number 8. I believe this is just probably a bad coil or plug with my car and I’m gonna have the dealer take care of it after I figure out the check engine lights caused by the downpipes. If anyone has had misfire with their car I’d also appreciate any insight even if it is somewhat unrelated.
Did a little digging around and it turned out that it wasn’t throwing one code it was multiple, PO420 and PO430 are being caused by the downpipes. But as to the aforementioned misfire I believe the car has done it in the past but this is the first time I have ever plugged a scanner into the car and saw a PO308 misfire on cylinder number 8. I believe this is just probably a bad coil or plug with my car and I’m gonna have the dealer take care of it after I figure out the check engine lights caused by the downpipes. If anyone has had misfire with their car I’d also appreciate any insight even if it is somewhat unrelated.
Yeah, It's not DP related unless primary O2's are bad (stripped wire during install?). Flashing check engine light usually means active misfire. I've had 0 drivability issues and I've pushed it hard and put more than 1500 miles on it since DP install.
Yeah, It's not DP related unless primary O2's are bad (stripped wire during install?). Flashing check engine light usually means active misfire. I've had 0 drivability issues and I've pushed it hard and put more than 1500 miles on it since DP install.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
. Otherwise almost no smell at all, I barely notice it even when letting the car warm up in the garage.
