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Cat/less Down Pipes - Feedback Please

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Old 01-04-2017, 01:35 AM
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Cat/less Down Pipes - Feedback Please

Hi Friends,

I'm considering new DPs either with Cat or Cat less. I don't plan to change the rest of the exhaust.

I need some real world feedback on the 2... I know the cat-less will be louder, however I do not want the fuel smell around my garage all the time.

Anyone with an aftermarket DP with cats, is the car still loud? what about the smell?

Narrowed these 3 brands down for the DP.

IPE - W/ Cats
http://www.ipe-f1.com/index.php/en-G...z/amg-c63-w205

FI - Cat less
http://www.fi-exhaust.com/product/me...5_amg_c63.html

Weistec - Cat less
http://weistec.com/all/c/c-63/2015-w...7/exhaust.html

Please feel free to recommend any others you feel are good.

Thanks!
Old 01-04-2017, 07:07 AM
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Sanch, are you open to cutting your factory dump pies to remove them?

I may concider this option if the fracture items can be re welded.

If you are ,did you see the below dump pipes that are two piece and manufacturer states they don't require removal of transmission to fit.

These are manufactured in Russia I think.

Rebellion Automotive in the UK also offered a RHD dump pipe set that also didn't require removal of transmission but I haven't heard anything further since their initial release.





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Old 01-04-2017, 05:40 PM
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Originally Posted by RDO247
Sanch, are you open to cutting your factory dump pies to remove them?

I may concider this option if the fracture items can be re welded.

If you are ,did you see the below dump pipes that are two piece and manufacturer states they don't require removal of transmission to fit.

These are manufactured in Russia I think.

Rebellion Automotive in the UK also offered a RHD dump pipe set that also didn't require removal of transmission but I haven't heard anything further since their initial release.
Yes, happy to cut them out - I'm not fussed about welding them back on... they will never be the same.

This is why I'm looking at Dp with cat options.

Good to know that there are 2 piece DP, might look into that.

Dropping trans/engine is a big no for me... at this early stage of having this car anyway.

They can get the ECU from the wheel arch so that's ok.
Old 01-04-2017, 06:22 PM
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Can downpipes be done without ECU tune? or the engine lights will turn on?
Old 01-04-2017, 06:35 PM
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Originally Posted by darwin329
Can downpipes be done without ECU tune? or the engine lights will turn on?
they can be done without the tune, but ur 02 sensor check engine will be on. The tune codes out the 02 sensors. I have the weistec dp which i got for 2k$ the smell isnt bad at all and makes the car significantly louder which i love alot. The Car stock was just way too quiet for me
Old 01-04-2017, 07:13 PM
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Originally Posted by PL27
they can be done without the tune, but ur 02 sensor check engine will be on. The tune codes out the 02 sensors. I have the weistec dp which i got for 2k$ the smell isnt bad at all and makes the car significantly louder which i love alot. The Car stock was just way too quiet for me
Good to know thank you for the feedback... Weistec 1
Old 01-04-2017, 07:22 PM
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I would like to know if catted downpipes require the engine and transmission to be removed for install. I have no problem cutting the stock ones out. But I fear that they need to be cut out because the cats. If that's the case then at downpipe with cats will not be able to be installed like one without the cats
Old 01-04-2017, 07:34 PM
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Originally Posted by Dthquazi
I would like to know if catted downpipes require the engine and transmission to be removed for install. I have no problem cutting the stock ones out. But I fear that they need to be cut out because the cats. If that's the case then at downpipe with cats will not be able to be installed like one without the cats
I was thinking the same thing.... unless the new cats are smaller and can squeeze through.

I like the above idea of the 2 piece DP as well.
Old 01-04-2017, 10:03 PM
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sorry guys but am not so technical when you say Catless it means when you install down pipes it requires to remove cats- catalytic converter???
Old 01-04-2017, 10:05 PM
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The cats are part of the downpipe. You can either buy downpipes with cats to replace the stock ones or go without.
Old 01-04-2017, 10:21 PM
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Originally Posted by Dthquazi
The cats are part of the downpipe. You can either buy downpipes with cats to replace the stock ones or go without.
Heres a picture the supplier provided to one of the forum members in relation to where the factory down pipes require cutting for removal.

Old 01-04-2017, 10:27 PM
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Originally Posted by Dthquazi
The cats are part of the downpipe. You can either buy downpipes with cats to replace the stock ones or go without.
thank you!!! both dp with cats and without same installation? you don't need to remove the transmission.. whats the difference between dp with cats and catless.
Old 01-04-2017, 11:21 PM
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Originally Posted by Sanch
I was thinking the same thing.... unless the new cats are smaller and can squeeze through.

I like the above idea of the 2 piece DP as well.
I think the cats sit quite low so only the top part of the pipe will be fed up to the turbo when installation is done without the removal of the transmission.

I also wonder if catted dump pipes are two piece or if they come in one piece as well.

In the picture below you can roughly place where the cat would sit in relation to the transmission.






Does anyone know what the legalities for deleting cats are in Australia?
Old 01-05-2017, 04:36 PM
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Sanch have you checked out Eurocharges 2 pieces DP.
Old 01-05-2017, 08:54 PM
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Originally Posted by NSAMG
Sanch have you checked out Eurocharges 2 pieces DP.
I just had a look can't believed I missed it.

http://www.eurocharged.com/products/.../c63-2015.html

They look great, I really wished they had a shop here in Oz
Old 01-06-2017, 02:51 AM
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Originally Posted by Sanch
I just had a look can't believed I missed it.

http://www.eurocharged.com/products/.../c63-2015.html

They look great, I really wished they had a shop here in Oz
I've heard that DPs are really loud. Have you considered just cutting the secondary cat out? If you plan on cutting the DPs out anyway, might be a good first port of call.
Old 01-06-2017, 04:54 AM
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Originally Posted by Andyroo
I've heard that DPs are really loud. Have you considered just cutting the secondary cat out? If you plan on cutting the DPs out anyway, might be a good first port of call.
This is also on the cards... But just waiting on feedback regarding the secondary cat removal before making a call.
Old 01-06-2017, 01:26 PM
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Originally Posted by Sanch
This is also on the cards... But just waiting on feedback regarding the secondary cat removal before making a call.
From what I've been told, it's raspier, 25% louder at full throttle, no real difference at idle and no drone. I'd go for it but I don't like the idea of cutting up such expensive pipes! That's why I'm getting the axle back pipes replaced with custom straight pipes (no perf exhaust, so no valve issues).
Old 01-06-2017, 02:38 PM
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Has anyone installed the Eurocharge TWO PIECES CATLESS DP with out dropping the transmission?
Old 01-06-2017, 05:01 PM
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Originally Posted by M177ED1
Has anyone installed the Eurocharge TWO PIECES CATLESS DP with out dropping the transmission?
You don't have to drop the transmission. But you have to cut the stock DPs
Old 01-07-2017, 08:28 AM
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I have Weistec dp installed, I decided to drop the transmission to keep the stock cat down pipe. I have it done last August till now and trouble free. Of course with Weistec ECU tune my car have transform to another level and it sounds a lot better and it's really loud! More fun to drive!
Old 01-07-2017, 11:33 AM
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I just move to the U.S few year ago in California. Dont know the legalities.. I know downpipes catless is more loud than the dp with cat but what happens when you smog test the car without cats? Does the exhaust have primary and secondary cats. I also check downpipes usually around $2k for the parts.. what do you think about this merchant i saw on ebay selling dp catless for $1300. Pls see attached file
Old 01-07-2017, 03:58 PM
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I just received my FI exhaust downpipes and they are also 2-piece. I'm almost sure you don't have to drop the tranny to get them installed but your stock dp's will be worthless.

Also I think all Catless downpipes will sound about the same.
Old 01-07-2017, 06:41 PM
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I have Weistec catless DPs and I love the sound. Got them for $1700. They mark up their prices a lot so beware. I went through a reseller.
Old 01-07-2017, 06:43 PM
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damn.... got mine for 1250 shipped for FI Exhaust


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