Photos (Sneak Peak) :: Bolt-in Catless Down-Pipes / Test Pipes :: 2010 C63
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AMG
There is a crossover in the resonator but its tiny by comparison and its essentially a tiny H-pipe. For the amount of gas volume & velocity you are talking about for a high revving 6.3L V8 its honestly not sufficient at all.
Super, you can still keep the current setup but just install and X-pipe, install it as close to the tranny/headers as possible right where the two exhaust pipes comes closer together and you should be able to pick up more power. The X-pipe should also help smoothen out the sound as well and quiet down a bit of the resonance
For a frame of reference... on an almost stock W210 E55 AMG, the X-pipe alone made 8wheel HP above 5000rpm up to the 6000rpm redline on the dyno (and that's on a much lower powered, lower revving M113 V8 so imagine on the high revving 6.3L AMG V8).
Super, you can still keep the current setup but just install and X-pipe, install it as close to the tranny/headers as possible right where the two exhaust pipes comes closer together and you should be able to pick up more power. The X-pipe should also help smoothen out the sound as well and quiet down a bit of the resonance
For a frame of reference... on an almost stock W210 E55 AMG, the X-pipe alone made 8wheel HP above 5000rpm up to the 6000rpm redline on the dyno (and that's on a much lower powered, lower revving M113 V8 so imagine on the high revving 6.3L AMG V8).
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CLK63 Black Series
....... the secondary cats have a cross over as well. When removed, there should be an X-pipe instead. That little H-like cross over at the resonators is not only too far back, but also too small to balance the exhaust.Super: Not only will the X-pipe show some gains, but it will also make the exhaust sound more refined.
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AMG
SMP is correct, the crossover in the resonator is essentially purely for noise cancellation (which is exactly what the resonators job is in the first place). Its simply too small to provide any legitimate power gains of any kind.
Don't expect crazy power from the X, however I wouldn't be surprised if the gains were 10-12HP above 5krpm, better than nothing over the previous setup that's for sure.
Don't expect crazy power from the X, however I wouldn't be surprised if the gains were 10-12HP above 5krpm, better than nothing over the previous setup that's for sure.
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2011 GLK 350, 2013 GT-R, & 2013 RAM 1500
SMP is correct, the crossover in the resonator is essentially purely for noise cancellation (which is exactly what the resonators job is in the first place). Its simply too small to provide any legitimate power gains of any kind.
Don't expect crazy power from the X, however I wouldn't be surprised if the gains were 10-12HP above 5krpm, better than nothing over the previous setup that's for sure.
Don't expect crazy power from the X, however I wouldn't be surprised if the gains were 10-12HP above 5krpm, better than nothing over the previous setup that's for sure.
Note: When I replaced the secondary cats with the X-pipe originally, I saw little/no gains up top. -> https://mbworld.org/forums/c63-amg-w...-2010-c63.html
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E63
SMP is correct, the crossover in the resonator is essentially purely for noise cancellation (which is exactly what the resonators job is in the first place). Its simply too small to provide any legitimate power gains of any kind.
Don't expect crazy power from the X, however I wouldn't be surprised if the gains were 10-12HP above 5krpm, better than nothing over the previous setup that's for sure.
Don't expect crazy power from the X, however I wouldn't be surprised if the gains were 10-12HP above 5krpm, better than nothing over the previous setup that's for sure.
I agree with putting the crossover as close to the in this case manifolds as possible, but you really can't compare the exhaust needs and requirements of two completely different setups. Displacement is different, valve count is different, valve/seat area is different, cams are different, exhaust from factory is different and on and on. Also factor in normal pull to pull dyno variation. The X may help but I'm not so sure it's a panacea.
Last edited by RStevens63; Jul 22, 2010 at 10:12 PM.
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From: Taiwan
Supercharged E92 M3
I don't know if the MB ECU as smart as the M3 are.
but the O2 sims don't work on my car !!!!!!!
mechanical or modules ones.
if you really want no headaches I would get a tune cat delete tune.
its the safest and no pains in the long run.
nice job with the report!
but the O2 sims don't work on my car !!!!!!!
mechanical or modules ones.
if you really want no headaches I would get a tune cat delete tune.
its the safest and no pains in the long run.
nice job with the report!
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CLK63 Black Series
I agree with putting the crossover as close to the in this case manifolds as possible, but you really can't compare the exhaust needs and requirements of two completely different setups. Displacement is different, valve count is different, valve/seat area is different, cams are different, exhaust from factory is different and on and on. Also factor in normal pull to pull dyno variation. The X may help but I'm not so sure it's a panacea.
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From: USA
2011 GLK 350, 2013 GT-R, & 2013 RAM 1500
Stock primaries and GT PRO X-Pipe are back in place. Car is civil again. 
Back to the track on Wednesday night.
Will work on the Cat-less Downpipes/X-Pipe combo in a couple weeks.
Back to the track on Wednesday night.
Will work on the Cat-less Downpipes/X-Pipe combo in a couple weeks.
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E63
I think he just used an example. I was talking about what I run on my CLK63 BS, since the engine in the C63 is the same. The only real difference between the two cars in exhaust set up is the resonators are much smaller in the Black Series and the diameter of the pipes are 2.75" compared to 2.5" in the C63.
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E63
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AMG
SMP is correct again, different setups vary I was merely providing a frame of reference.
I will say, that X-pipe is not the best ever, it could be improved upon, the merge is a bit smaller than it should be and its not a smooth curve but a sharp joint. You want the merge to be a smooth crossover to allow the gasses to mix properly then exit quickly without any sort of obstruction. Many of the Xs on the market don't do this properly. Designing the perfect X isn't easy but its still a decent X. The magnaflow ones are actually pretty good at this, but they just look cheap and are stamped (but they get the job done, only downside is the pipes are spread too far apart so they don't fit that well).
I bet you the X will make significantly more on a long tube setup. The stock OEM manifolds are the major bottleneck in the system and as a result it can't make the gains above 4k it normally could if it had more airflow to work with. Sometimes you have to remind yourself that proper exhaust design is a balancing act of multiple bottlenecks and sometimes by eliminating one... you run right into another. So just b/c it doesn't make gains on that specific dyno, does not disprove its functionality or efficacy.
Hope that helps.
I will say, that X-pipe is not the best ever, it could be improved upon, the merge is a bit smaller than it should be and its not a smooth curve but a sharp joint. You want the merge to be a smooth crossover to allow the gasses to mix properly then exit quickly without any sort of obstruction. Many of the Xs on the market don't do this properly. Designing the perfect X isn't easy but its still a decent X. The magnaflow ones are actually pretty good at this, but they just look cheap and are stamped (but they get the job done, only downside is the pipes are spread too far apart so they don't fit that well).
I bet you the X will make significantly more on a long tube setup. The stock OEM manifolds are the major bottleneck in the system and as a result it can't make the gains above 4k it normally could if it had more airflow to work with. Sometimes you have to remind yourself that proper exhaust design is a balancing act of multiple bottlenecks and sometimes by eliminating one... you run right into another. So just b/c it doesn't make gains on that specific dyno, does not disprove its functionality or efficacy.
Hope that helps.
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2017 E63S (due in May), 2013 GTR, 2013 Exige S
Hi!! I am new here. Just wanna say Hi to everyone. After browsing through, i just find this forum is very intereting with lots of useful & good advice!!! Thanks for all the contribution.
Thanks for the updates Superlub!! Looking forward to more.
I am about to track my c63 in Aug and here is some info. about the mod.:
1) i have deleted the middle cat. (sorry, i dont know the exact term for this part, can someone tell me pls). But after it is done, it became a lots louder n feels smoother, so I like it. (approx. US 400)
2) MHP ECU flash ECU + TCU (see attached for the dyno results after flash). Feel free to advice or spot anything unusual, thx.
Since cant attached extra photo, will continue in next post.
Thanks for the updates Superlub!! Looking forward to more.
I am about to track my c63 in Aug and here is some info. about the mod.:
1) i have deleted the middle cat. (sorry, i dont know the exact term for this part, can someone tell me pls). But after it is done, it became a lots louder n feels smoother, so I like it. (approx. US 400)
2) MHP ECU flash ECU + TCU (see attached for the dyno results after flash). Feel free to advice or spot anything unusual, thx.
Since cant attached extra photo, will continue in next post.
Member
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2017 E63S (due in May), 2013 GTR, 2013 Exige S
3) i am considering for this exhaust (c photo) or should I just try GT PRO X-Pipe + header? (any advice??)
4) does anyone who has engine oil + gear box temp. problem when you track your c63 coz i heard a few friends already complaint about being able to do 2-4 laps MAX (in China). That would be a HUGE concern for me, to be real honest. So i will consider the DTM style front bumper w larger holes + adding direct water spray to the cooler (still discussing w my garage about how to do this)
5) anyone has any problem when tracking c63 e.g. temp., brakes? btw, mine has the AMG performance package.
Cheers & thx guys.
4) does anyone who has engine oil + gear box temp. problem when you track your c63 coz i heard a few friends already complaint about being able to do 2-4 laps MAX (in China). That would be a HUGE concern for me, to be real honest. So i will consider the DTM style front bumper w larger holes + adding direct water spray to the cooler (still discussing w my garage about how to do this)
5) anyone has any problem when tracking c63 e.g. temp., brakes? btw, mine has the AMG performance package.
Cheers & thx guys.
Thread Starter
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From: USA
2011 GLK 350, 2013 GT-R, & 2013 RAM 1500
OK, back on track . . . literally. Here's some more data.
My car has 1) Kleemann K1 Tune, 2) PLM Manifolds, 3) Evosport Pulley & 4) Nitto Drag Radials. The driver (me) is 6'3" and 230-lbs.
07/21/10 - w/ Catless Downpipes (No X-Pipe) & 1/4 tank of gas
Anyhow, there is definitely some power to be had with the catless down pipes at the top end. It's not a HUGE gain, but there is something there. At the end of the day I don't think it's enough for me to chase after. I may still try a new X-Pipe w/ the catless downpipes but I'm really leaning towards just getting a set of Long Tubes and calling it a day. I need to figure out sound control as anything catless is just too loud during cold start ups for me and my neighbors.
With cooler air and/or a diet I'll be comfortably in the high-11's as-is. LT Headers (and the gobs of torque they make) should easily push me to mid-11's. If I can find a day where the DA dips into the negative thousands I'll be in for a nice treat regardless of my setup. Fun times ahead!
More to come . . .
My car has 1) Kleemann K1 Tune, 2) PLM Manifolds, 3) Evosport Pulley & 4) Nitto Drag Radials. The driver (me) is 6'3" and 230-lbs.
07/21/10 - w/ Catless Downpipes (No X-Pipe) & 1/4 tank of gas
My Best Runs
1.861 60', 12.059 @ 116.94 MPH (1/8 Mile 7.835 @ 92.50 MPH)
1.861 60', 12.070 @ 116.70 MPH (1/8 Mile 7.837 @ 92.37 MPH)
My Best Run Corrected (using DA @ 8:53PM of 1,125-ft above sea level)
11.919 @ 118.326 MPH
07/28/10 - w/ Stock Primary Cats + GT PRO X-Pipe & 1/2 tank of gas1.861 60', 12.059 @ 116.94 MPH (1/8 Mile 7.835 @ 92.50 MPH)
1.861 60', 12.070 @ 116.70 MPH (1/8 Mile 7.837 @ 92.37 MPH)
My Best Run Corrected (using DA @ 8:53PM of 1,125-ft above sea level)
11.919 @ 118.326 MPH
My Best Runs
1.826 60', 12.028 @ 115.87 MPH (1/8 Mile 7.769 @ 92.40 MPH)
1.844 60', 12.078 @ 115.56 MPH (1/8 Mile 7.810 @ 91.76 MPH)
My Best Run Corrected (using DA @ 8:53PM of 599-ft above sea level)
11.970 @ 116.390 MPH
Note: I'm not a huge fan of drag racing in the summer (high temps & humidity) but these week-to-week conditions are pretty close for comparison's sake. The DA corrected numbers tell the best story.1.826 60', 12.028 @ 115.87 MPH (1/8 Mile 7.769 @ 92.40 MPH)
1.844 60', 12.078 @ 115.56 MPH (1/8 Mile 7.810 @ 91.76 MPH)
My Best Run Corrected (using DA @ 8:53PM of 599-ft above sea level)
11.970 @ 116.390 MPH
Anyhow, there is definitely some power to be had with the catless down pipes at the top end. It's not a HUGE gain, but there is something there. At the end of the day I don't think it's enough for me to chase after. I may still try a new X-Pipe w/ the catless downpipes but I'm really leaning towards just getting a set of Long Tubes and calling it a day. I need to figure out sound control as anything catless is just too loud during cold start ups for me and my neighbors.
With cooler air and/or a diet I'll be comfortably in the high-11's as-is. LT Headers (and the gobs of torque they make) should easily push me to mid-11's. If I can find a day where the DA dips into the negative thousands I'll be in for a nice treat regardless of my setup. Fun times ahead!
More to come . . .
Last edited by superlubricity; Jul 29, 2010 at 10:19 AM.
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From: North Jersey
2012 CTS-V
OK, back on track . . . literally. Here's some more data.
My car has 1) Kleemann K1 Tune, 2) PLM Manifolds, 3) Evosport Pulley & 4) Nitto Drag Radials. The driver (me) is 6'3" and 230-lbs.
07/21/10 - w/ Catless Downpipes (No X-Pipe) & 1/4 tank of gas
Anyhow, there is definitely some power to be had with the catless down pipes at the top end. It's not a HUGE gain, but there is something there. At the end of the day I don't think it's enough for me to chase after. I may still try a new X-Pipe w/ the catless downpipes but I'm really leaning towards just getting a set of Long Tubes and calling it a day. I need to figure out sound control as anything catless is just too loud during cold start ups for me and my neighbors.
With cooler air and/or a diet I'll be comfortably in the high-11's as-is. LT Headers (and the gobs of torque they make) should easily push me to mid-11's. If I can find a day where the DA dips into the negative thousands I'll be in for a nice treat regardless of my setup. Fun times ahead!
More to come . . .
My car has 1) Kleemann K1 Tune, 2) PLM Manifolds, 3) Evosport Pulley & 4) Nitto Drag Radials. The driver (me) is 6'3" and 230-lbs.
07/21/10 - w/ Catless Downpipes (No X-Pipe) & 1/4 tank of gas
My Best Runs
1.861 60', 12.059 @ 116.94 MPH (1/8 Mile 7.835 @ 92.50 MPH)
1.861 60', 12.070 @ 116.70 MPH (1/8 Mile 7.837 @ 92.37 MPH)
My Best Run Corrected (using DA @ 8:53PM of 1,125-ft above sea level)
11.919 @ 118.326 MPH
07/28/10 - w/ Stock Primary Cats + GT PRO X-Pipe & 1/2 tank of gas1.861 60', 12.059 @ 116.94 MPH (1/8 Mile 7.835 @ 92.50 MPH)
1.861 60', 12.070 @ 116.70 MPH (1/8 Mile 7.837 @ 92.37 MPH)
My Best Run Corrected (using DA @ 8:53PM of 1,125-ft above sea level)
11.919 @ 118.326 MPH
My Best Runs
1.826 60', 12.028 @ 115.87 MPH (1/8 Mile 7.769 @ 92.40 MPH)
1.844 60', 12.078 @ 115.56 MPH (1/8 Mile 7.810 @ 91.76 MPH)
My Best Run Corrected (using DA @ 8:53PM of 599-ft above sea level)
11.970 @ 116.390 MPH
Note: I'm not a huge fan of drag racing in the summer (high temps & humidity) but these week-to-week conditions are pretty close for comparison's sake. The DA corrected numbers tell the best story.1.826 60', 12.028 @ 115.87 MPH (1/8 Mile 7.769 @ 92.40 MPH)
1.844 60', 12.078 @ 115.56 MPH (1/8 Mile 7.810 @ 91.76 MPH)
My Best Run Corrected (using DA @ 8:53PM of 599-ft above sea level)
11.970 @ 116.390 MPH
Anyhow, there is definitely some power to be had with the catless down pipes at the top end. It's not a HUGE gain, but there is something there. At the end of the day I don't think it's enough for me to chase after. I may still try a new X-Pipe w/ the catless downpipes but I'm really leaning towards just getting a set of Long Tubes and calling it a day. I need to figure out sound control as anything catless is just too loud during cold start ups for me and my neighbors.
With cooler air and/or a diet I'll be comfortably in the high-11's as-is. LT Headers (and the gobs of torque they make) should easily push me to mid-11's. If I can find a day where the DA dips into the negative thousands I'll be in for a nice treat regardless of my setup. Fun times ahead!
More to come . . .
It looks like some of your torque returned with the cats and X-pipe
setup which is reflected in your 60' times. Obviously, horsepower
is down a little with this setup.
Maybe some MBH long tubes w/cats as a compromise. That is the
combination I'm leaning towards.
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.
Originally Posted by superlubricity; I need to figure out sound control as [B
anything catless is just too loud[/B] during cold start ups for me and my neighbors.
Not a fan of racing in the summer? Our low temps are hotter than your daily high.....ugh!
Thread Starter
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From: USA
2011 GLK 350, 2013 GT-R, & 2013 RAM 1500
The humidity in the summer's early evening is the killer up here.
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From: Vegas and Vancouver, BC
.
Touche.
It is strange hearing a Benz sound like a muscle car.
EDIT: Have you spoke with James @ ACGSD about the Cargraphic headers? Price is better than what is currently out there and mates with stock secondaries or your GT Pro X.
It is strange hearing a Benz sound like a muscle car.
EDIT: Have you spoke with James @ ACGSD about the Cargraphic headers? Price is better than what is currently out there and mates with stock secondaries or your GT Pro X.
Last edited by Sincity; Jul 29, 2010 at 03:56 PM.
