500E Catalytic converter options - advice needed

[Greg1980]

HI,

I need top replace my cats. What would be the best option apart from MB? I have found Magnaflow P'n'P set up or would consider to use universal cats welded into original pipes. Secondly, my car is from Japan therefore it has this exhaust temperature sensor. Is it possible to get rid of of it and what would this involve.

I have found few post here but could find a very clear answer.

 

[emerydc8]

This might help if the company is still in business.

Thread 'Catalytic Converter Replacement'

Catalytic Converter Replacement | M119 Engine

 

[gsxr]

MB is not an option, the factory cats have been NLA for years. Used ones in good condition are difficult to find. There's no simple answer, it depends if you just need to pass local emission testing, or want the best quality / long lasting aftermarket cats, or want super high flow, etc etc. Good cats are stupid expensive. If you don't have smog testing you can delete them.

I believe the Japan-spec exhaust temp sensor can be deleted, AFAIK all it did was turn on an idiot light in the instrument cluster.

 

[northNH]

Used ones in good condition are difficult to find.

I have one, from a ~90K mile ‘92 400…

Although the thin sheetmetal wrap around the pipes has obvious deterioration which could be improved, the cats, connecting pipes and flanges, etc. are all sound and without significant functional damage.

Ship-able?

 

[gsxr]

That can be shipped within USA. To go overseas it would need a freight forwarding service. Would be difficult to box/pack properly though!

 

[emerydc8]

My cats were not very expensive and they are still holding up after almost 9 years. I wouldn’t hesitate to install them on my other car too if the time comes. Before I run the car through emissions testing I change the oil, and get the cats as hot as I can by driving across town in 2nd at about 4000 RPM and idling at 2000 RPM in line before it gets to be my turn. I got complacent one year and didn’t heat sink it before testing and it failed. The cats must be hot to do their job. Went back the next day and passed

 

[gsxr]

Jon, are your MBS cats still available? I tried finding them today and it seems they might be NLA, or replaced with something different?

 

[northNH]

Also…

 

[sheward]

The holy grail!

I have one too...

 

[jnes]

Carus oldtimer parts claims that they have front exhaust with cats.

Auspuffrohr - Auspuffanlage - I - Auspuffanlage - Fahrgestell / Aufba

Ersatzteile für Ihren Mercedes Auspuffrohr - Auspuffanlage - I - Auspuffanlage - Fahrgestell / Aufbau finden Sie im Carus Onlineshop... OE-Nr:1244906620

carus-parts.de

I orderd rear subframe mounts and they seem good quality.

Edit: Brochure attached

 

[Greg1980]

Carus oldtimer parts claims that they have front exhaust with cats.

Auspuffrohr - Auspuffanlage - I - Auspuffanlage - Fahrgestell / Aufba

Ersatzteile für Ihren Mercedes Auspuffrohr - Auspuffanlage - I - Auspuffanlage - Fahrgestell / Aufbau finden Sie im Carus Onlineshop... OE-Nr:1244906620

carus-parts.de

I orderd rear subframe mounts and they seem good quality.

Edit: Brochure attached

thanks, I have just sent the an enquire.

 

[emerydc8]

Jon, are your MBS cats still available? I tried finding them today and it seems they might be NLA, or replaced with something different?

I can’t find them either, Dave. I found the bent madrel website but it looks like they aren’t offering cats anymore.

High Flow Catalytic Converters - Mandrel Bending Solutions

mandrelbendingsolutions.com

 

[Joncf]

Catalytic Converter for 1992 1993 Mercedes 400E | eBay

Find many great new & used options and get the best deals for Catalytic Converter for 1992 1993 Mercedes 400E at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Has anyone tried these “AB Catalytic” cats? It’s a Canadian company that makes them to order, but also goes by other names like “exhaust evolved.”

 

[gsxr]

Has anyone tried these “AB Catalytic” cats? It’s a Canadian company that makes them to order, but also goes by other names like “exhaust evolved.”

I'd swear those were discussed before, and the general thought was that $450 USD for a complete bent pipe with 2 cats, would likely be somewhere between junk and trash. A single high-quality aftermarket catalyst can cost over $450...

 

[Joncf]

Id swear those were discussed before, and the general thought was that $450 USD for a complete bent pipe with 2 cats, would likely be somewhere between junk and trash. A single high-quality aftermarket catalyst can cost over $450...

That's what I thought. So it's probably best to have it all custom made with good quality aftermarket catalysts?

 

[gsxr]

Thats what I thought. So its probably best to have it all custom made with good quality aftermarket catalysts?

Often the existing cat pipe can be reused, and you only need good aftermarket cats welded in.

 

[Greg1980]

Carus oldtimer parts claims that they have front exhaust with cats.

Auspuffrohr - Auspuffanlage - I - Auspuffanlage - Fahrgestell / Aufba

Ersatzteile für Ihren Mercedes Auspuffrohr - Auspuffanlage - I - Auspuffanlage - Fahrgestell / Aufbau finden Sie im Carus Onlineshop... OE-Nr:1244906620

carus-parts.de

I orderd rear subframe mounts and they seem good quality.

Edit: Brochure attached

HI, got the response from Carus... 2200 euros.. plus shipping

 

[2phast]

I chose a Magnaflow cat, which was a two into one cat designed for 5l mustangs. Worked great and was affordable vs. going with two separate cats.

 

[cargen]

Milltek Weld-In High-Flow Sports Catalyst- 100CPSI- 58mm Cone - SSXMTK001

Milltek Sport exhaust systems, SAVE ONLINE. Buy Milltek Weld-In High-Flow Sports Catalyst- 100CPSI- 58mm Cone - SSXMTK001online.

progressiveparts.com

Would something like this also work as a replacement? 2 1/4" inner diameter(58mm) is the only requirement I can think of at the moment.

 

[jnes]

HI, got the response from Carus... 2200 euros.. plus shipping

Quite expensive, I think. How much is the shipping? I paid 2100€ my custom SS-exhaust..

 

[dominicdeac]

I have one, from a ~90K mile ‘92 400…

Although the thin sheetmetal wrap around the pipes has obvious deterioration which could be improved, the cats, connecting pipes and flanges, etc. are all sound and without significant functional damage.

Ship-able?

View attachment 163085View attachment 163086View attachment 163087View attachment 163087

Do you still have these?

 

[northNH]

Yes I do but it hasn’t gotten any smaller…
I await your interest and reply.

 

[dominicdeac]

How much are you looking to get?

 

[Joncf]

Yes I do but it hasn’t gotten any smaller…
I await your interest and reply.

You told me you’d shake them for me.

 

[northNH]

@Joncf re: our Conversation ~6 months ago:

“I did give them a good shake when they were removed and they passed the rattling test.
Will repeat but I’m not as strong as I used to be…”

Passed rattle test again today tho’ weaker still.