When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Thinking about some cheap exhaust mods to try out the sound, and there's two options I'm currently considering:
- Secondary cat delete
- Axle back straight through
The first option requires some butchery, which I'm not sure about. In the UK the secondary cat still has to be present to pass emissions test, so that means gutting the original (very expensive to reverse) or replacing it with a dummy (still means cutting up pipe).
The second option is easily reversible as the stock exhaust has connectors at the axle, and is simply two pipes with hangers fabricated and swapped.
From the little I've seen, I prefer the sound of the secondary cat removal—more raspy and euro-V8 sounding—but the axle back is completely reversible.
So my question is, has anyone done either of those mods? What do you think of them? How does the sound compare to stock?
I'm sort of on the same track, however I doubt I will be throwing in downpipes. i'm only looking for an aftermarket exhaust system that will add more goosebumps to those nearby
check out my thread "exhaust systems for the sedan", some guys on here shared their thoughts
I'm sort of on the same track, however I doubt I will be throwing in downpipes. i'm only looking for an aftermarket exhaust system that will add more goosebumps to those nearby
check out my thread "exhaust systems for the sedan", some guys on here shared their thoughts
Thanks! Have you considered axle back straight pipes at all or seen/heard any good examples of anyone who has done them?
well what I was told by one of our friends on here that axle backs will require shorter pipes , that's what I understood. you pay more for less parts I guess.
I'll look it up and post exactly what he said on here.
well what I was told by one of our friends on here that axle backs will require shorter pipes , that's what I understood. you pay more for less parts I guess.
I'll look it up and post exactly what he said on here.
I guess I could just take the rear pipes off and that would give me an idea of what a straight pipe from axle back would sound like
I have no issues with the sound of eisenmann. JPMs from what i have heard sounds great.
My comment was related to the system being axle back vs cat back. so you are getting less for more $$. AWE and others come with the entire mid pipe and a 3rd valve.
i have added a picture the stuff in RED is the mid pipe which is not included with an Axle back. the green is all you would be getting.
once again i have no idea how much difference it makes, but the mid pip on aftermarket is a large diameter so usually that is a deeper sound.
I just wanted to provide as much info as possible from what i know.
My vote would be for AWE as its the best i have heard in person so far.
I think there is someone in the U.K. That is running straight pipes as you mention(added link above) Basically had a custom made pipe from the axels back. The only issue with that is if you have the perf exhaust (with button). If the valves are removed it will throw the car into limp mode. If you search the torqueflow facebook you can hear what it will sound like if you go with the axel back straightpipe.
I think there is someone in the U.K. That is running straight pipes as you mention(added link above) Basically had a custom made pipe from the axels back. The only issue with that is if you have the perf exhaust (with button). If the valves are removed it will throw the car into limp mode. If you search the torqueflow facebook you can hear what it will sound like if you go with the axel back straightpipe.
That's great! I have the non perf exhaust so that should work fine.
Thinking about some cheap exhaust mods to try out the sound, and there's two options I'm currently considering:
- Secondary cat delete
- Axle back straight through
The first option requires some butchery, which I'm not sure about. In the UK the secondary cat still has to be present to pass emissions test, so that means gutting the original (very expensive to reverse) or replacing it with a dummy (still means cutting up pipe).
The second option is easily reversible as the stock exhaust has connectors at the axle, and is simply two pipes with hangers fabricated and swapped.
From the little I've seen, I prefer the sound of the secondary cat removal—more raspy and euro-V8 sounding—but the axle back is completely reversible.
So my question is, has anyone done either of those mods? What do you think of them? How does the sound compare to stock?
Thanks,
Andrew
Hi Andrew,
Im new to the forum and very interested in having my C63 Estate Exhaust Changed with taking the Secondary Cats out.
Im am based in the UK could you drop me a message where you had your Cats Removed as I find it hard to trust certain shops carry out the work.
Im new to the forum and very interested in having my C63 Estate Exhaust Changed with taking the Secondary Cats out.
Im am based in the UK could you drop me a message where you had your Cats Removed as I find it hard to trust certain shops carry out the work.
Kind Regards
I had the work done at Fast Road Conversions in Ashford, Kent. They said it was quite a fiddly job. Sounded perfect though. No done, more like NA sound.
I had the work done at Fast Road Conversions in Ashford, Kent. They said it was quite a fiddly job. Sounded perfect though. No done, more like NA sound.
Thanks very much for the reply.
You have just reminded me the name of the Fab Shop, They removed my Secondary Cats on my W204!
I am Based in Kent and just looking for that bit of Extra Volume. I had the Engine Update carried out today on my W205 Estate Without PE and it made a difference to the Exhaust sound in Sport +
Do you happen to have any Videos of the sound? I would hate to loose the AMG Bark.
You have just reminded me the name of the Fab Shop, They removed my Secondary Cats on my W204!
I am Based in Kent and just looking for that bit of Extra Volume. I had the Engine Update carried out today on my W205 Estate Without PE and it made a difference to the Exhaust sound in Sport +
Do you happen to have any Videos of the sound? I would hate to loose the AMG Bark.
Cheers
i dont have a video, but i can assure you the sound becomes harder edged and closer to the W204 sound. Its clearer and the bark is more pronounced. It’s also louder, but at motorway speeds it’s a nice quiet note and not a drone.
i dont have a video, but i can assure you the sound becomes harder edged and closer to the W204 sound. Its clearer and the bark is more pronounced. It’s also louder, but at motorway speeds it’s a nice quiet note and not a drone.
Car is all booked in.
I have two Questions for you,
When they cut the cats did they put a Flange on one end and bolt it or weld a pipe on the inside of the old pipe? A picture would be great if you have one? They have suggested to weld a flange o the pipe coming off the engine and then weld it further down? He said it’s the best way so the pipe is the same thickness throughout as some other people have had a slightly smaller pipe inserted into the old and welded both sides.
How long have you had the Secondary CAT Delete and have you experienced any issues or Problems. Cheers
When they cut the cats did they put a Flange on one end and bolt it or weld a pipe on the inside of the old pipe? A picture would be great if you have one? They have suggested to weld a flange o the pipe coming off the engine and then weld it further down? He said it’s the best way so the pipe is the same thickness throughout as some other people have had a slightly smaller pipe inserted into the old and welded both sides.
How long have you had the Secondary CAT Delete and have you experienced any issues or Problems. Cheers
i asked them to put a flange in to make the pipe and cats swappable, but they said there wasnt room so it was welded straight in. What you’re saying does make sense though.
i dont still have the car but i did have the mod for about a year and it was fine. First i tried back box delete which was horrible, whereas the secondary cat delete was absolutely fine and perfectly liveable. It reminds me of the fType r a bit, a nice loud sound when you gun it but non-invasive when you’re cruising.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
