Hi all,

I will be looking to swap over the exhaust soon, planning on a 3" catback, thinking a single backbox with maybe subtle DTM tips.

One thing I do want to ask is the interchangeability of the saloon vs estate backboxes. The reason why I am looking to change the rear box is due to the fact that the pipe goes from the engine down to the nearside of the car, enters a HUUUUGE rear box which goes all the way along the rear of the car and then 180 bend at the end and exits on the near side again.

I am actually tempted to simply remove the backbox and attach an exhaust tip on the end - eg de-backbox it. I did notice that the saloon E300 have a much smaller box which I believe is a straight through as stock box anyway, I do want to go with a very subtle exhaust and am tempted to just have the exhaust tips pointing down to the ground.

I am planning on fitting a exhaust cutout pipe soon though which would dump exhaust from the downpipe unsilenced for drag runs, then close up and run though the stock system on the way home.

Does anyone know the stock pipe diameter as it might just be worth going for the exhaust cutout route and then run the stock system 95% of the time. As its diesel its being silenced by the cat and the turbo, although the straightpiped cars do sound really good.

Anyone fitted a cutout pipe before on theirs?

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UK spec Mercedes W210 E300 Turbodiesel wagon - OM606.962 with 722.6 transmission - rust free!

Year, make and model might help people respond. I'd like a larger exhaust for more power- but I don't want my car any louder than it already is. If it's less noisy that'd be great- I just want more power. I have a 1984 300TD with many modifications.

Its a standard 97/98 E300 turbodiesel estate, I think the issue is that as its an estate the exhaust system is different eg much larger at the back. I did also notice that the body shape is being shown as an 'S210' rather than a 'W210'.

I am thinking it might be easiest to just run a stock system but just have an exhaust cutout valve just after the downpipe so I can run either fully stock or no exhaust.

I think the issue is the fact that I would be wanting to go for a 3" system rather than whatever size bore is standard.

Another option could be to run a 3" system but simply have large midboxes, I believe most of the mercedes ones are straight through anyway. I want to keep the stealthy look so I am still thinking hidden tailpipes.

Here are the options I am thinking:

• Stock exhaust system but with a cutout valve right after the downpipe
• 3" catback system with large straight through midboxes (No cutout)
• 3" catback system with large straight through midboxes with cutout before larger backbox
• 3" catback system with single rear back box (no cutout)
• Straight pipe - best option for flow but not subtle

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UK spec Mercedes W210 E300 Turbodiesel wagon - OM606.962 with 722.6 transmission - rust free!

Rumor has it the aero turbine muffler ($100-$150ish) is straight through but has good reviews on noise reduction.

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

Many thanks for that, I was thinking to go with a 3" catback and then run a large straight through muffler across the back of the car which exits on the offside of the car. Eg it would be the same size and shape as the OEM muffler but be less restrictive as with the stock setup it doubles back on itself and exits the same side it enters.

I won't be having any exhaust tips showing as they aren't showing on the stock system, just trying to find a balance between performance and stealth, I guess with a very large straight through muffler you would get all of the flow without the extra noise. As its an estate there is plenty of room back there, I think removing all of the other silencers along the way makes sense, although I could always run 2 smaller mufflers instead of 1 larger one.

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UK spec Mercedes W210 E300 Turbodiesel wagon - OM606.962 with 722.6 transmission - rust free!

Every time I fire up the S-10 I'm AMAZED at how quiet it is with absolutely NO exhaust system (check my build thread - I'm not exaggerating!). Guess what I'm saying is that I don't think muffling will be much of an issue.

If you look at hot rod sources you'll find all sorts of remote cut-outs, most electrically operated. A friend has a pair on a V8 and they work well and seal when not in use. He got his online but I don't have the manufacturer. A quick trip to Speedway Motors' website should get you started.

Dan

Straight pipes sound great on this car:

https://youtu.be/7IaH3ECoWks

https://youtu.be/VUMK3Du6NrM

https://youtu.be/SlWFvbmwLlY

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-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

I know when I debackboxed another of my diesels it was quiet, its because the turbo and the cat also muffle the sound. I will be doing some mods in a few months after I get a base drag run with a stock setup.

I was looking at exhaust cutouts but it might just be worth running the car all the time with the exhaust setup I want rather than switching between the 2.

I might have an issue with the MOT though as if I just go with a straight pipe from the mid pipe it might not be classed as a full system and fail. The same is true with the cat, the cat has to be there if it was fitted as standard on the car.

I will have a look into some ideas, I want to keep things as simple as possible. The current exhaust system at the back I can see has been repaired slightly so I might just use the current stock system and simply cut the backbox off and then reattach a straight through one instead - or indeed keep it removed depending on the noise level.

I am aware that it wouldn't be that loud compared to a petrol car, however if you can hear its slightly sportier than it isn't as stealthy as it could be.

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UK spec Mercedes W210 E300 Turbodiesel wagon - OM606.962 with 722.6 transmission - rust free!