Mercedes SLK World banner
  • Hey Everyone! Enter your ride HERE to be a part of this months Ride of the Month Challenge!
Status
Not open for further replies.
1 - 20 of 49 Posts

·
Registered 2005 SLK55 AMG
Joined
·
883 Posts
Discussion Starter · #1 ·
In March I'm planning on getting an X Pipe and Filters done. Before I make the decision, I need to know all the options I have for the exhaust?
And also I've been advised BMC filters. What's the opinions on these?

And prices. I have touched on this in another thread and searched. But looking for fresh ideas incase there are better options now.

Thanks in advance :D
 

·
*Premium Member
2005 SLK55 AMG
Joined
·
11,537 Posts
Exhaust options...

Phil, a summary of some of the exhaust options you have will include:
1. just remove secondary cats
2. just replace centre resonator with x-pipe (either custom pipe, or pre-fabricated x-pipe - Magnaflow is quite popular)
3. have the centre resonator and secondary cats cut out and replaced by x-pipe and stainless steel pipe
4. buy a 3rd party replacement exhaust system, or part system - but can be much more expensive

I don't know anyone that has done option 1.

Andy ( @ZeroZero ) has done option 2, with a Magnaflow x-pipe.

I've done option 3, with a custom-built x-pipe using stainless steel pipe. Many others (including @Col and @AMG_Heaven ) have done option 3 using the Magnaflow pre-fab x-pipe (and I think Russ - @RacingBlue - may be thinking about doing this now too). No real advantage of pre-fab vs custom built - pre-fab means buying the x-pipe, but then the work to fit is easier/quicker, so probably very similar costs. Expect this to be somewhere in the region of £200-£300 total, depending on where you have it done.

With any of the above, some exhaust shops will offer to fit the new bits with flanges so that you can remove them later - others may just weld the new bits in. Col, Angelo and I have ours fitted with flanges, and Angelo even had the bit that was removed fitted with flanges now too, so he can swap back to (almost) standard very easily, if needed.

Option 4 can be very expensive - someone advertised a used Quicksilver system for sale on the forum a few weeks ago (here). No idea how that compares, or if it's still available, but it's another option.


... or you could go for custom/Kleeman headers, although I think that takes out the primary cats, so will cause 'complications' for emissions test of the MOT in the UK.

I'm sure others will be along to share other options they know of too... :D
 
  • Like
Reactions: Phil1987uk

·
Registered 2005 SLK55 AMG
Joined
·
883 Posts
Discussion Starter · #3 ·
Cheers. Option 3 sounds the best to me if most have done that. Plus it's reasonably priced. Can you just explain, I thought I just needed the X Pipe itself. Do you have to buy a straight pipe for part of the exhaust too?
I see, is there any performance or sound difference with flange or weld?
Have you kept the original exhaust in your garage then? Incase you want it back standard.

I've asked if Russ @RacingBlue wants to get them done together :D

Think I'll go for the magna flow Russ showed me. Any pics of straight pipe?

Also any info on the filters?
 

·
Premium Member
Joined
·
1,021 Posts
Dave has nicely covered the options, I did the x pipe only first as I was concerned that deleting the secondary cats aswell would be too loud. It's not, wish I had done it at the same time.
 

·
Founding Member 2006
Joined
·
108,815 Posts

·
Premium Member
Joined
·
1,021 Posts
x pipe replaces the centre resonator, additional straight pipes to replace the secondary cats. Mine was custom built by Infinity Exhausts near Bristol who have a very good reputation.

I've not changed my filters, but I have read posts on here advising to go with dry ones to avoid damage. I am sure someone will add their recommendations.
 

·
Registered 2005 SLK55 AMG
Joined
·
883 Posts
Discussion Starter · #7 ·
Yea think I'm going for BMC. I have been quoted £143 for the 2 including fitting.
So how much does the straight pipe cost?

I live in Hull so Bristol is pretty far. But the Midlands is reasonable. Can anyone recommend a place? Russ mentioned custom chrome I think they're called.
 

·
*Premium Member
2005 SLK55 AMG
Joined
·
11,537 Posts
Can you just explain, I thought I just needed the X Pipe itself. Do you have to buy a straight pipe for part of the exhaust too?
No need to buy more pipe - the exhaust shop will provide that as part of doing the work. Just agree with them whether you'll buy the Magnaflow (if that's the way you have it done), or whether they will supply and fit it (I think Col and Angelo bought their own and had the exhaust shop fit it).

I see, is there any performance or sound difference with flange or weld?
Not as far as I'm aware.

Have you kept the original exhaust in your garage then? Incase you want it back standard.
Yes...


Think I'll go for the magna flow Russ showed me. Any pics of straight pipe?
Here's a pic of the custom x-pipe, made from stainless steel pipe (also available from link in my sig)...


Also any info on the filters?
Not from me as I still have OEM filters, but Jeff has already commented on BMC for you too.
 
  • Like
Reactions: Phil1987uk

·
*Premium Member
2005 SLK55 AMG
Joined
·
11,537 Posts
I live in Hull so Bristol is pretty far. But the Midlands is reasonable. Can anyone recommend a place? Russ mentioned custom chrome I think they're called.
Several of us have used Custom Chrome at Nuneaton (link in my sig). They did mine with custom pipe, and then did Col's and Angelo's with a Magnaflow that I think they had bought themselves from eBay.

In hindsight, I think I might have gone the Magnaflow route, but didn't consider that at the time, and I'm more than happy with the work they did on mine. The results sound the same to me! >:D
 
  • Like
Reactions: Phil1987uk

·
Registered 2005 SLK55 AMG
Joined
·
883 Posts
Discussion Starter · #10 ·
Thanks. I think I'll book it in there then. Sounds like it's worth the journey. Just need Russ on board :D
 

·
Premium Member
Joined
·
1,021 Posts
I guarantee you won't stop grinning like an idiot all the way home :grin:
 

·
Registered 2005 SLK350
Joined
·
163 Posts
you will get a better sound from x-pipe than h-pipe imho. tried both on my 350 and the x-pipe was a much sweeter sound (unless of course you like the 'American muscle car sound') also the x-pipe design is more efficient due to better scavenging of the gases.


also wouldn't bother with 'performance filters', unless you are running at extreme states of tune a standard paper filter is able to supply far more air flow than your engine can possibly use
 

·
*Premium Member
2005 SLK55 AMG
Joined
·
177 Posts
I did option 3 with the X-pipe custom made by the exhaust centre. I put Green filters on as they were recommended. If you look at OEM filters they are very bulky, I think the engine breaths better but I'm not convinced about any change in engine note. Had the thing remapped today and it's even better. Not convinced about headers as on UK roads I don't believe there's the opportunity to use the additional power!
 

·
*Registered
2005 SLK55 AMG
Joined
·
1,893 Posts
K&N Air Filter Review - Debunking the Myths (and why OEM is better)


interesting reading, one of many with similar findings.......
I recently replaced the OEM filters in my 55 with Crossland items from Euro. The old ones coming out looked relatively clean. Turning them over and knocking them on a wall released a small amount of dust and grit, but visually nothing excessive. They certainly didn't 'appear' to be old and tired. The Crossland looked and felt identical, it terms of the stiffness of the paper, number of folds and dimensions and feel of the carrier foam. When fitted, I was amazed at the difference. Far better idle (slightly higher revs, more creep at traffic lights) and noticeably better throttle response. Under £17 the pair! In future, I'll be changing them every 10-12k miles.
 

·
*Premium Member
2005 SLK55 AMG
Joined
·
11,537 Posts
I did option 3 with the X-pipe custom made by the exhaust centre. I put Green filters on as they were recommended. If you look at OEM filters they are very bulky, I think the engine breaths better but I'm not convinced about any change in engine note. Had the thing remapped today and it's even better. Not convinced about headers as on UK roads I don't believe there's the opportunity to use the additional power!
I'd be very interested in hearing more about the remap... such as where, how much and what results were achieved. :D
 
  • Like
Reactions: Phil1987uk

·
Registered 2005 SLK55 AMG
Joined
·
883 Posts
Discussion Starter · #20 ·
For those who have removed secondary cats, have there been any emissions issues at MOT time?
I haven't done it yet. But from what I've read etc and from people on here. Removing the resonator and secondary cats is the best you can do to the exhaust, performance wise and sound wise keeping it MOT friendly. Anything else like removing primary cats etc would make it fail the MOT.
I think that's why it's such a good option.

On the remap, it's usually known that only forced induction engines can get a lot more power. But on the 55 even though it's normally aspirated there is still quite a bit to get out of it. I've been quoted by the local Merc specialists upto £300. A Kleeman remap can cost a couple of thousand.

Feel free to correct me if I am wrong on any other the above :D
 
  • Like
Reactions: spook
1 - 20 of 49 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Status
Not open for further replies.
Top