Downpipe options
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Joined: Sep 2016
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2016 AMG GT-S Edition 1
Downpipe options
What you guys' experiences with catted vs catless downpipes?
Most downpipes for the M178 are catless (Weistec, Agency Power, Eurocharged) and priced betweeen $2000-$3000. The unique feature of Agency Power's catless downpipe is that they are 3.5" diameter tubing at the turbo and taper to 3.0". All other manufacturers are 3.0".
Renntech downpipes are catted at priced at $5000!
So unless there is an overwhelming reason go to catted, I'm thinking of going catless. Can you please share your experiences though to confirm my decision is correct. Thanks
Most downpipes for the M178 are catless (Weistec, Agency Power, Eurocharged) and priced betweeen $2000-$3000. The unique feature of Agency Power's catless downpipe is that they are 3.5" diameter tubing at the turbo and taper to 3.0". All other manufacturers are 3.0".
Renntech downpipes are catted at priced at $5000!
So unless there is an overwhelming reason go to catted, I'm thinking of going catless. Can you please share your experiences though to confirm my decision is correct. Thanks
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From: THE Orange County, California
2024 C8 Z06- 2025 BMW CS- 2022 Porsche 992 GTS
No experience personally with DP's but I have heard its almost more cost efficient to just go with the Turbo upgrades as the labor for the dp's is long and expensive.
If you must go DP's then Weistec and DIME are good options at the price point you are looking at (and proven) but the gains are really mostly tq with some peak (not usable hp). Our cars really will have traction issues as you start pushing that much mid range tq so a good set of rubber will need to be attached.
If you must go DP's then Weistec and DIME are good options at the price point you are looking at (and proven) but the gains are really mostly tq with some peak (not usable hp). Our cars really will have traction issues as you start pushing that much mid range tq so a good set of rubber will need to be attached.
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Ml63
What you guys' experiences with catted vs catless downpipes?
D
Most downpipes for the M178 are catless (Weistec, Agency Power, Eurocharged) and priced betweeen $2000-$3000. The unique feature of Agency Power's catless downpipe is that they are 3.5" diameter tubing at the turbo and taper to 3.0". All other manufacturers are 3.0".
Renntech downpipes are catted at priced at $5000!
So unless there is an overwhelming reason go to catted, I'm thinking of going catless. Can you please share your experiences though to confirm my decision is correct. Thanks
D
Most downpipes for the M178 are catless (Weistec, Agency Power, Eurocharged) and priced betweeen $2000-$3000. The unique feature of Agency Power's catless downpipe is that they are 3.5" diameter tubing at the turbo and taper to 3.0". All other manufacturers are 3.0".
Renntech downpipes are catted at priced at $5000!
So unless there is an overwhelming reason go to catted, I'm thinking of going catless. Can you please share your experiences though to confirm my decision is correct. Thanks
If you don't have a tune no cats will give you a CEL. If your car is tuned that won't be an issue. Only issue is with your warranty and if you have required emissions testing. No cats will not pass.
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2016 AMG GTS ED1, 2013 C63 P31 Coupe
Vic55 and TD33 are right. DPs do increase the tq a good amount though a stock set-up has a hard enough time getting traction as is. Also, a proper install of DPs require the tranny to be dropped to remove the stock cats. Otherwise, a cheaper (though not recommended) alternative is to cut the stock cats out and shorten the install time (no tranny drop). Obviously this destroys your stock parts and if you ever get a state ref, you're SOL. Since our turbos are sitting nice and pretty up top, install is a bit easier.
I recommend reaching out to Dime Racing for your options. They can help with the tune as well to suppress the O2 CEL.
I recommend reaching out to Dime Racing for your options. They can help with the tune as well to suppress the O2 CEL.
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From: Los Angeles
'16 C63-S
I would recommend getting in touch with Dime for the downpipes. I sent Sony there and he seems to be very happy with his setup. If I were to do it again, I'll probably pass on them and get the turbos directly though.
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What you guys' experiences with catted vs catless downpipes?
Most downpipes for the M178 are catless (Weistec, Agency Power, Eurocharged) and priced betweeen $2000-$3000. The unique feature of Agency Power's catless downpipe is that they are 3.5" diameter tubing at the turbo and taper to 3.0". All other manufacturers are 3.0".
Renntech downpipes are catted at priced at $5000!
So unless there is an overwhelming reason go to catted, I'm thinking of going catless. Can you please share your experiences though to confirm my decision is correct. Thanks
Most downpipes for the M178 are catless (Weistec, Agency Power, Eurocharged) and priced betweeen $2000-$3000. The unique feature of Agency Power's catless downpipe is that they are 3.5" diameter tubing at the turbo and taper to 3.0". All other manufacturers are 3.0".
Renntech downpipes are catted at priced at $5000!
So unless there is an overwhelming reason go to catted, I'm thinking of going catless. Can you please share your experiences though to confirm my decision is correct. Thanks
Dime Racing
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From: Naples FL
2021 Porsche TTS
A cheaper option which achieves most of what the downpipes do is cut the secondary set of cats.
Only costs you a few hundred bucks. Fully reversible and no CEL. Just my 2 cents.
I would agree with most that the DP cost is prohibitive and if you are OK with mods potentially affecting your OEM warranty, then the turbo option is the way to go.
Only costs you a few hundred bucks. Fully reversible and no CEL. Just my 2 cents.
I would agree with most that the DP cost is prohibitive and if you are OK with mods potentially affecting your OEM warranty, then the turbo option is the way to go.
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From: Naples FL
2021 Porsche TTS
I only know of GAD that does bigger turbos.
I suspect Dime Racing in the US with the rwhp they claim is also a full swap of turbos.
The other tuners currently only provide reworked stockers
I suspect Dime Racing in the US with the rwhp they claim is also a full swap of turbos.
The other tuners currently only provide reworked stockers
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2012 Mercedes SLS, 2014 Mercedes SLS Black Series, 2014 E63S, 2013 S550, 2012 ML63, 2013 C250
We have downpipes coming out in 2 weeks. What I assure you is the best fit and we eliminate the exhaust donut that every other aftermarket downpipes still uses. We started do this with our newest E63 downpipes and it has worked out perfectly.
Pricing on cats downpipes will be $1950.00 up until the end of the month.
Pricing on cats downpipes will be $1950.00 up until the end of the month.
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GT3
We have downpipes coming out in 2 weeks. What I assure you is the best fit and we eliminate the exhaust donut that every other aftermarket downpipes still uses. We started do this with our newest E63 downpipes and it has worked out perfectly.
Pricing on cats downpipes will be $1950.00 up until the end of the month.
Pricing on cats downpipes will be $1950.00 up until the end of the month.
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From: OH
2017 Audi R8 V10 Plus
Bringing this thread from the dead.. maybe some time has passed and new developments have since occurred.
Some people here saying it's better to just install better turbos. My question is, won't the 4 stock cats still be a bottleneck to better turbos?
I was shopping and researching downpipes for a bit more sound and performance but now I'm not so sure...
Some people here saying it's better to just install better turbos. My question is, won't the 4 stock cats still be a bottleneck to better turbos?
I was shopping and researching downpipes for a bit more sound and performance but now I'm not so sure...
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Joined: Dec 2014
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/////PRO
Bringing this thread from the dead.. maybe some time has passed and new developments have since occurred.
Some people here saying it's better to just install better turbos. My question is, won't the 4 stock cats still be a bottleneck to better turbos?
I was shopping and researching downpipes for a bit more sound and performance but now I'm not so sure...
Some people here saying it's better to just install better turbos. My question is, won't the 4 stock cats still be a bottleneck to better turbos?
I was shopping and researching downpipes for a bit more sound and performance but now I'm not so sure...
Kooks Exotics downpipes were fantastic, had the best purest non welded together mandrel bends, unfortunately that business went by the wayside for them and they are done with the “exotic” scene, now I would start by taking a look at Keller Performance downpipes for our cars if I were in the market for stainless, or BRogue Built if after all titanium.
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AMG GTS
Yes, the cats are a restriction no matter what, stock turbos, big turbos, etc.....
Kooks Exotics downpipes were fantastic, had the best purest non welded together mandrel bends, unfortunately that business went by the wayside for them and they are done with the “exotic” scene, now I would start by taking a look at Keller Performance downpipes for our cars if I were in the market for stainless, or BRogue Built if after all titanium.
Kooks Exotics downpipes were fantastic, had the best purest non welded together mandrel bends, unfortunately that business went by the wayside for them and they are done with the “exotic” scene, now I would start by taking a look at Keller Performance downpipes for our cars if I were in the market for stainless, or BRogue Built if after all titanium.
Actually, you can still get the Kooks Exotic down pipe/midpipe combo. I bought a new set about 2 months ago. Great construction, however I did have an issue with fitment. I bought the parts from a distributor but dealt with Kooks directly to resolve the issue. I sent the left bank back and they confirmed the down pipe bend was slightly off. They corrected the issue and sent me a check to cover my shipping expenses. Good customer service.
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/////PRO
Actually, you can still get the Kooks Exotic down pipe/midpipe combo. I bought a new set about 2 months ago. Great construction, however I did have an issue with fitment. I bought the parts from a distributor but dealt with Kooks directly to resolve the issue. I sent the left bank back and they confirmed the down pipe bend was slightly off. They corrected the issue and sent me a check to cover my shipping expenses. Good customer service.
