Downpipes
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Joined: Jul 2008
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From: Overland Park KS
22 SL63
Downpipes
Hello!
Picked up a brilliant blue GTS a few weeks ago:-) love it!
I will be doing the Renntech R2 upgrade but not sure about doing the included Downpipes . Love the sound but worry it's TOO loud. For those that have done DP's....any regrets?
I realize I have cheaper options but going Renntech.
Thanks in advance!
Picked up a brilliant blue GTS a few weeks ago:-) love it!
I will be doing the Renntech R2 upgrade but not sure about doing the included Downpipes . Love the sound but worry it's TOO loud. For those that have done DP's....any regrets? I realize I have cheaper options but going Renntech.
Thanks in advance!
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From: Birmingham, AL
cars and stuff
If you're in C mode there's really no discernible sound difference. In S it's certainly louder and S+ sounds like an open header racer with the valves open. You can close the valves in S/S+ obviously and quiet it down some but it's still noticeably louder. I drive my GT a lot and over fairly significant distances (500mi one way) and cruising in C there's no difference from stock. No drone at all to speak of. If I had it to do over again I'd do the exact same thing I did. I recently posted a review of my Renntech set up and thoughts on sound, power, etc.
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Hello!
Picked up a brilliant blue GTS a few weeks ago:-) love it! I will be doing the Renntech R2 upgrade but not sure about doing the included Downpipes . Love the sound but worry it's TOO loud. For those that have done DP's....any regrets?
I realize I have cheaper options but going Renntech.
Thanks in advance!
Picked up a brilliant blue GTS a few weeks ago:-) love it!
I will be doing the Renntech R2 upgrade but not sure about doing the included Downpipes . Love the sound but worry it's TOO loud. For those that have done DP's....any regrets? I realize I have cheaper options but going Renntech.
Thanks in advance!
Not sure how RT gets away with 5k DPs.
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From: MI
2024 G63 AMG, 2022 GLE 63S AMG
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From: Naples FL
2021 Porsche TTS
Congrats on the purchase. I am glad to see that people are finally picking this awesome sports car.
The issue with downpipes is for resale purposes, you cannot put it back to stock as the OEM pipes need to be cut out unless you want to drop the transmission (insane option IMHO).
As AMG17GT said, the deletion of the secondary cats is the way to go. I did it on mine and with the sport exhaust, it's perfect.
The issue with downpipes is for resale purposes, you cannot put it back to stock as the OEM pipes need to be cut out unless you want to drop the transmission (insane option IMHO).
As AMG17GT said, the deletion of the secondary cats is the way to go. I did it on mine and with the sport exhaust, it's perfect.
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2016 AMG GT-S Edition 1
So you're saying there are no O2 sensors on the secondary cats? I guess this is a job for a muffler shop with welding capability?
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2024 G63 AMG, 2022 GLE 63S AMG
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These are the catalysts cans. They get HOT.
They are located just in front of frame support where exhaust turns 90. Very simple. On the C63 these are forward about 6-12", so it's easier on GT.
In the past, I have removed resonators which were intended to reduce drone and high frequency noise. Here it's just another 7 decibels of the same sound an octave lower.
In comfort mode it's the same except a funkier bass at idle. Yes I luv it! Ha.
That's all I have on this mod.
They are located just in front of frame support where exhaust turns 90. Very simple. On the C63 these are forward about 6-12", so it's easier on GT.
In the past, I have removed resonators which were intended to reduce drone and high frequency noise. Here it's just another 7 decibels of the same sound an octave lower.
In comfort mode it's the same except a funkier bass at idle. Yes I luv it! Ha.
That's all I have on this mod.
Last edited by AMG 17GT; Apr 23, 2017 at 04:10 PM.
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From: MI
2024 G63 AMG, 2022 GLE 63S AMG
These are the catalysts cans. They get HOT.
Attachment 353261
They are located just in front of frame support where exhaust turns 90. Very simple.
Attachment 353261
They are located just in front of frame support where exhaust turns 90. Very simple.
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From: Overland Park KS
22 SL63
Thanks guys and all good info! boosting1bar thanks for your write up in an earlier post. As for deleting the secondary cats, did it effect the pops and crackles when de accelerating any? Would hate to lose that. If anyone has any sound clips of the deleted cats please post up.You guys are just having a shop cut them out? Nobody sells just a mid-pipe that bypasses the secondaries?
Thanks
Thanks
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2017 AMG GT
Weistec appears to have both the downpipes and secondary section as part of their exhaust. It's also considerably less than the cost of Renntech. Not sure the build quality but the video they posted of their 10.9 quarter mile pass sounds really good.
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From: Naples FL
2021 Porsche TTS
The deletion of the secondary cats do not effect anything else that the car does (crackles and pops in S+). Just think of it as stock car with increased deeper sound.
Why buy a mid-pipe (don't know of any vendors having them) when you can get it done and fully reversible for a couple of hundred bucks?
Why buy a mid-pipe (don't know of any vendors having them) when you can get it done and fully reversible for a couple of hundred bucks?
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2016 AMG GT-S Edition 1
The deletion of the secondary cats do not effect anything else that the car does (crackles and pops in S+). Just think of it as stock car with increased deeper sound.
Why buy a mid-pipe (don't know of any vendors having them) when you can get it done and fully reversible for a couple of hundred bucks?
Why buy a mid-pipe (don't know of any vendors having them) when you can get it done and fully reversible for a couple of hundred bucks?
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2024 G63 AMG, 2022 GLE 63S AMG
+1. And cost wise what is considered reasonable cost for something like this? Just wondering rather than having someone looking at a 100K+ car and throwing an outrageous number for a mainly labor job...
Last edited by jchochla; Apr 25, 2017 at 07:26 PM. Reason: error
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2021 Porsche TTS
I believe I was the first one to do it 
.
It is not complicated guys.
Disconnect the battery just to be on safe side.
Cut the secondary cat with a hack saw, cut and bend a new pipe and weld new pipe on car (they have tools to weld around).
Any competent muffler shop performs this type of stuff daily.
You should not be paying more than $300 and I am including a lot of MB tax on that.
.It is not complicated guys.
Disconnect the battery just to be on safe side.
Cut the secondary cat with a hack saw, cut and bend a new pipe and weld new pipe on car (they have tools to weld around).
Any competent muffler shop performs this type of stuff daily.
You should not be paying more than $300 and I am including a lot of MB tax on that.
Last edited by emericr; Apr 26, 2017 at 10:33 AM.
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2016 MB AMG GTS
I'm thinking of removing the secondary cats/resonators as well. Since I know little about exhausts, can someone confirm that the ones crossed out in the pic below are the parts the should be cut out and replaced with a straight tube? (Pic borrowed from Dr. Graphx)
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