Just Picked Up A 2019 GLS63 AMG!
#26
Super Member
I never did a dyno. I also did them in increments - Brabus rear section, then added Supersprint midpipe, then added Rado catted downpipe.
Rear section is more free flowing that OEM, the mid pipe eliminates the resonators (i.e. even more free flowing), then the Rado with GESI 300 cell cats - made the entire rear exhaust much more free flowing than OEM.
You can hear the exhaust is more free flowing and the turbo sounds even come through.
When you add a tune on top of that, all of it together - absolutely you can feel the difference. Night and day.
I believe turbos benefit from low back pressure so my HP/TQ gains from the tune are most likely amplified by the free-flowing exhaust. But someone who knows more can comment.
I drove several thousand miles on the Rado downpipes with zero tune and no CEL. My tune also does not turn off the CEL/O2 sensors and still no CEL. So the GESI 300 cell cats are doing their job. I highly recommend them for any stock or tuned ECU.
Rear section is more free flowing that OEM, the mid pipe eliminates the resonators (i.e. even more free flowing), then the Rado with GESI 300 cell cats - made the entire rear exhaust much more free flowing than OEM.
You can hear the exhaust is more free flowing and the turbo sounds even come through.
When you add a tune on top of that, all of it together - absolutely you can feel the difference. Night and day.
I believe turbos benefit from low back pressure so my HP/TQ gains from the tune are most likely amplified by the free-flowing exhaust. But someone who knows more can comment.
I drove several thousand miles on the Rado downpipes with zero tune and no CEL. My tune also does not turn off the CEL/O2 sensors and still no CEL. So the GESI 300 cell cats are doing their job. I highly recommend them for any stock or tuned ECU.
#28
Super Member
I should add what is bolt-on and what is not.
1) Rado catted downpipe - bolt-on. Fits OEM midpipe/rear section (it's all one huge piece) and also bolt-on to supersprint mid-pipe (you need to purchase their adapters from Supersprint).
2) Supersprint midpipe - bolt-on to OEM Cats. You have to use the supersprint rear section or chop up the oem rear section since the OEM exhaust is one huge piece after the cats. You will also need reducers as the supersprint is 3.00" and oem is 2.75". ECS tuning is the only authorized dealer for supersprint in the USA. not on their website, you need to call directly to order. takes a while as it ships from italy.
3) brabus rear section - you need a reducer from 3.00" to 2.75" to connect the supersprint mid pipe. any exhaust shop can do it, but i ordered a custom piece online in stainless. i didn't even weld it on, just used high quality stainless steel clamps and tested for leaks. no issues. Now i can remove any section easily.
The brabus rear section is really the key in my opinion because it has a valved exhaust connected to the computer system (COMMAND?). You press and hold a button on the steering wheel and it opens or closes (up or down button) and it goes from tame to insane. Brabus actually calls it "coming home" mode and that's exactly what I use it for - when I'm in my neighborhood I close the valves so I'm quiet.
Open the exhaust, you have turbo whistles, burbles, etc. just insane.
1) Rado catted downpipe - bolt-on. Fits OEM midpipe/rear section (it's all one huge piece) and also bolt-on to supersprint mid-pipe (you need to purchase their adapters from Supersprint).
2) Supersprint midpipe - bolt-on to OEM Cats. You have to use the supersprint rear section or chop up the oem rear section since the OEM exhaust is one huge piece after the cats. You will also need reducers as the supersprint is 3.00" and oem is 2.75". ECS tuning is the only authorized dealer for supersprint in the USA. not on their website, you need to call directly to order. takes a while as it ships from italy.
3) brabus rear section - you need a reducer from 3.00" to 2.75" to connect the supersprint mid pipe. any exhaust shop can do it, but i ordered a custom piece online in stainless. i didn't even weld it on, just used high quality stainless steel clamps and tested for leaks. no issues. Now i can remove any section easily.
The brabus rear section is really the key in my opinion because it has a valved exhaust connected to the computer system (COMMAND?). You press and hold a button on the steering wheel and it opens or closes (up or down button) and it goes from tame to insane. Brabus actually calls it "coming home" mode and that's exactly what I use it for - when I'm in my neighborhood I close the valves so I'm quiet.
Open the exhaust, you have turbo whistles, burbles, etc. just insane.
#29
MBWorld Fanatic!
Thread Starter
I should add what is bolt-on and what is not.
1) Rado catted downpipe - bolt-on. Fits OEM midpipe/rear section (it's all one huge piece) and also bolt-on to supersprint mid-pipe (you need to purchase their adapters from Supersprint).
2) Supersprint midpipe - bolt-on to OEM Cats. You have to use the supersprint rear section or chop up the oem rear section since the OEM exhaust is one huge piece after the cats. You will also need reducers as the supersprint is 3.00" and oem is 2.75". ECS tuning is the only authorized dealer for supersprint in the USA. not on their website, you need to call directly to order. takes a while as it ships from italy.
3) brabus rear section - you need a reducer from 3.00" to 2.75" to connect the supersprint mid pipe. any exhaust shop can do it, but i ordered a custom piece online in stainless. i didn't even weld it on, just used high quality stainless steel clamps and tested for leaks. no issues. Now i can remove any section easily.
The brabus rear section is really the key in my opinion because it has a valved exhaust connected to the computer system (COMMAND?). You press and hold a button on the steering wheel and it opens or closes (up or down button) and it goes from tame to insane. Brabus actually calls it "coming home" mode and that's exactly what I use it for - when I'm in my neighborhood I close the valves so I'm quiet.
Open the exhaust, you have turbo whistles, burbles, etc. just insane.
1) Rado catted downpipe - bolt-on. Fits OEM midpipe/rear section (it's all one huge piece) and also bolt-on to supersprint mid-pipe (you need to purchase their adapters from Supersprint).
2) Supersprint midpipe - bolt-on to OEM Cats. You have to use the supersprint rear section or chop up the oem rear section since the OEM exhaust is one huge piece after the cats. You will also need reducers as the supersprint is 3.00" and oem is 2.75". ECS tuning is the only authorized dealer for supersprint in the USA. not on their website, you need to call directly to order. takes a while as it ships from italy.
3) brabus rear section - you need a reducer from 3.00" to 2.75" to connect the supersprint mid pipe. any exhaust shop can do it, but i ordered a custom piece online in stainless. i didn't even weld it on, just used high quality stainless steel clamps and tested for leaks. no issues. Now i can remove any section easily.
The brabus rear section is really the key in my opinion because it has a valved exhaust connected to the computer system (COMMAND?). You press and hold a button on the steering wheel and it opens or closes (up or down button) and it goes from tame to insane. Brabus actually calls it "coming home" mode and that's exactly what I use it for - when I'm in my neighborhood I close the valves so I'm quiet.
Open the exhaust, you have turbo whistles, burbles, etc. just insane.
#30
MBWorld Fanatic!
Thread Starter
I’m in the fence about downpipes because I live in CA and smog is strict over here. I want to be able to smog the car no problem without having to change things back and fourth. So BMC Filters, resonator delete and Capristo Axelback would be my route along with a tune from someone. Who’s the best tuner for these cars? Renntech is a household name but are there better tunes out there?
Johncy
Johncy
#32
MBWorld Fanatic!
Thread Starter
#33
MBWorld Fanatic!
Thread Starter
Thinking of replacing my resonator with this universal 3” Xpipe. What do you guys think as a simple mod before shelling out the cash for an exhaust?
#35
MBWorld Fanatic!
Thread Starter
#36
MBWorld Fanatic!
Thread Starter
Anyone have pics of a stock resonator on a GLS63? I want to compare it to this Xpipe I want to replace it with.
#37
Super Member
1) Call Worldmotorsports and see if their downpipes pass CA emissions. https://www.world-motorsports.com/ra...downpipes.html They are in CA so they should know. If you just do OBDII check in CA for your year car, I would say it will because nothing is turned off and no error lights. Even with a tune, you can tell them to not turn off the O2 sensors (or whatever it is they do).
2) I don't know for sure if the Brabus fits the rear section of the GLS63, but I assume so. Worst case scenario you use the tips of the OEM exhaust. For the GL63, it works with the stock bumper:
https://gtfactory.ru/proekty/mercede...rabus-exhaust/
3) You can see a picture of the stock exhaust which should be similar/identical to the gls63. Any reasoning for the X-pipe? If you want something more quiet, I would understand that, as the exhaust frequencies would hit each other and cancel some noise out. With a twin turbo for hp, you want the least resistance flow straight through as possible (from my understanding, again, correct me if I'm wrong).
Case in point is I was going to get a x-pipe for my panamera turbo and someone did it before I did. It made the exhaust more quiet with no difference in feel. I left mine alone after that review.
4) Yes, removing resonators and replacing with straight pipe is the cheapest, fastest solution. Just be sure they use stainless steel and use someone who knows how to weld stainless steel and not use aluminum filler.
5) Capristo Axelback sounds cool - be sure to take pictures of the exhaust! really curious to how it all looks.
6) you want a warranty, go with Brabus Piggy back for 620hp. Check out OBDII tuning with OE Tuning. Jeremy has been around and knows what he is doing. You can ask for a burble tune too if you some extra sounds. You can also get several different maps, e.g. 91 octane, 93 octane, race octane, with burble, without burble, etc. https://www.pressertech.com/ is another good option where they tune within MB safety parameters. They also fix ECU's so they know what they are doing. Eurocharged also does OBDII tuning. Not sure if Renntech has OBDII yet or not.
2) I don't know for sure if the Brabus fits the rear section of the GLS63, but I assume so. Worst case scenario you use the tips of the OEM exhaust. For the GL63, it works with the stock bumper:
https://gtfactory.ru/proekty/mercede...rabus-exhaust/
3) You can see a picture of the stock exhaust which should be similar/identical to the gls63. Any reasoning for the X-pipe? If you want something more quiet, I would understand that, as the exhaust frequencies would hit each other and cancel some noise out. With a twin turbo for hp, you want the least resistance flow straight through as possible (from my understanding, again, correct me if I'm wrong).
Case in point is I was going to get a x-pipe for my panamera turbo and someone did it before I did. It made the exhaust more quiet with no difference in feel. I left mine alone after that review.
4) Yes, removing resonators and replacing with straight pipe is the cheapest, fastest solution. Just be sure they use stainless steel and use someone who knows how to weld stainless steel and not use aluminum filler.
5) Capristo Axelback sounds cool - be sure to take pictures of the exhaust! really curious to how it all looks.
6) you want a warranty, go with Brabus Piggy back for 620hp. Check out OBDII tuning with OE Tuning. Jeremy has been around and knows what he is doing. You can ask for a burble tune too if you some extra sounds. You can also get several different maps, e.g. 91 octane, 93 octane, race octane, with burble, without burble, etc. https://www.pressertech.com/ is another good option where they tune within MB safety parameters. They also fix ECU's so they know what they are doing. Eurocharged also does OBDII tuning. Not sure if Renntech has OBDII yet or not.
#38
MBWorld Fanatic!
Join Date: Aug 2003
Location: In my garage
Posts: 8,424
Received 1,003 Likes
on
810 Posts
E55, GLS450, GL63, GLE350
Here is the info on the Renntech tuner. https://www.renntechmercedes.com/ind...6-gls63-detail
Nothing against OE but my SL has an OE tune and I still get CEL's from time to time. I could probably use a dyno tune due to all the mods. Seems to make good power though.
Nothing against OE but my SL has an OE tune and I still get CEL's from time to time. I could probably use a dyno tune due to all the mods. Seems to make good power though.
#39
MBWorld Fanatic!
Thread Starter
Thanks for all the input guys. This really helps. I went ahead and ordered the universal 3” Xpipe. Can’t wait to hear what it sounds like! I think I’ll be happy for the time being with just a res delete Xpipe and a tune. We’ll see!
Johncy
Johncy
#41
SPONSOR
Join Date: Dec 2010
Location: Santa Ana, CA
Posts: 5,696
Received 130 Likes
on
114 Posts
OE Tuning C63 AMG
Here is the info on the Renntech tuner. https://www.renntechmercedes.com/ind...6-gls63-detail
Nothing against OE but my SL has an OE tune and I still get CEL's from time to time. I could probably use a dyno tune due to all the mods. Seems to make good power though.
Nothing against OE but my SL has an OE tune and I still get CEL's from time to time. I could probably use a dyno tune due to all the mods. Seems to make good power though.
Thanks
#42
MBWorld Fanatic!
`
solomon@eurocharged.com
He will answer all your questions -
Incredible to work with -
By far the best price -
I did both the ECU and TCU tunes -
Outstanding with NO CEL's -
You should talk with him before you purchase
a tune from anyone - it's free to ask questions -
Thank-You
D.B.
.
solomon@eurocharged.com
He will answer all your questions -
Incredible to work with -
By far the best price -
I did both the ECU and TCU tunes -
Outstanding with NO CEL's -
You should talk with him before you purchase
a tune from anyone - it's free to ask questions -
Thank-You
D.B.
.
Last edited by COOPERDB; 02-18-2019 at 03:59 PM.
#43
MBWorld Fanatic!
Join Date: Aug 2003
Location: In my garage
Posts: 8,424
Received 1,003 Likes
on
810 Posts
E55, GLS450, GL63, GLE350
Can you please email a list of all CELs you are getting to sales@oetuning.com so we can address this for you. Our tunes should not cause a CEL if the correct tune for the modifications is installed.
Thanks
Thanks
#44
MBWorld Fanatic!
Thread Starter
Just got the resonator deleted and Xpipe installed. The sound is not much louder upon start up and normal driving. But when you give it some gas it sounds more throaty with a more pronounced backfire sound when letting off the throttle. The car feels like it lost some low end power but mid to top rev range is improved. Maybe the ECU is adapting to the changes I have made on the car. All in all I spent $100 on the Xpipe and $250 for the install with 3” piping which is not bad to start this build off!
Last edited by Johncy2000; 02-22-2019 at 11:25 PM.
#48
MBWorld Fanatic!
Thread Starter
#50
MBWorld Fanatic!
Join Date: Aug 2003
Location: In my garage
Posts: 8,424
Received 1,003 Likes
on
810 Posts
E55, GLS450, GL63, GLE350
Before you get the expensive mufflers, try removing the stock ones. I think you will be pleasantly surprised.
Renntech sells an OBD2 lowering module for the GLS but it is expensive.
Is this the one on Amazon?
Renntech sells an OBD2 lowering module for the GLS but it is expensive.
Is this the one on Amazon?