Which Catalytic Converter is the best and where ?

[seanieboy]

Can anyone recommend the best Cats to buy for my 4.5 ajp 1998 and where to buy?

seen these ones but on this site http://www.car-parts-scotland.co.uk/Shop/TVR/Catal...

But they are cheap so wanted to know if anyone has tried them !!!

[jamieduff1981]

Do you intend to keep them in all the time?

I got a CE marked pair for my 4.5 for about £150 from Ebay which got me through my MOT no problems

[seanieboy]

Well the garage took my old ones of the other day and the car sounds like a tractor on nitrous ! it sounds terrible

and when it back fires it's like a firework going off!!! so really need some badly

[ridds]

I personally wouldn't touch any of them for long term use.

They will be ceramic matrix type, increase back pressure and probably stop working after 12 months.

Find someone that can mount a pair of 100 or 200 cell metallic foil catalyst in the space currently left as they will last longer and not restrict your engine during WOT operation.

[Gazzab]

seanieboy said:

Well the garage took my old ones of the other day and the car sounds like a tractor on nitrous ! it sounds terrible

and when it back fires it's like a firework going off!!! so really need some badly

A cerb without cats is a wonderful thing.

[Ireland]

The originals on my car were the 100-cell type

I bought a set of the 400-cell ones to pass a test but I definitely wouldn't leave them on the car long-term, I could feel it while driving the car that the engine was under pressure, was like it was being strangled.

Check the sellers on ebay and if they have a phone number or contact details listed you could phone them and see would they make a proper set for you.

I was going to get that done but they would have been expensive and I only wanted them for the test so I just bought the cheap ones.

[Mark.]

ridds said:

Find someone that can mount a pair of 100 or 200 cell metallic foil catalyst in the space currently left as they will last longer and not restrict your engine during WOT operation.

I've got these - 200 cell. Fitted by the previous owner and manufactured down here on the south cost. I don't even know if the company exists anymore but I can check out the paperwork for you if you like?
Passes the MOT OK on emissions and sounds wonderful even at idle.
http://www.youtube.com/watch?v=3swtDgkyE78

[seanieboy]

Gazzab said:

A cerb without cats is a wonderful thing.

I will try and video the sound of mine see what you think!

[seanieboy]

Mark. said:

I've got these - 200 cell. Fitted by the previous owner and manufactured down here on the south cost. I don't even know if the company exists anymore but I can check out the paperwork for you if you like?
Passes the MOT OK on emissions and sounds wonderful even at idle.
http://www.youtube.com/watch?v=3swtDgkyE78

Thanks for the advise if you could find the paperwork that would be great and let me know cheers

[seanieboy]

Ireland said:

The originals on my car were the 100-cell type

I bought a set of the 400-cell ones to pass a test but I definitely wouldn't leave them on the car long-term, I could feel it while driving the car that the engine was under pressure, was like it was being strangled.

Check the sellers on ebay and if they have a phone number or contact details listed you could phone them and see would they make a proper set for you.

I was going to get that done but they would have been expensive and I only wanted them for the test so I just bought the cheap ones.

Great advice thank you buddy

[Gazzab]

seanieboy said:

Gazzab said:

A cerb without cats is a wonderful thing.

I will try and video the sound of mine see what you think!

It really shouldnt sound worse with cats in unless its a not v good sports exhaust?

[seanieboy]

Has anyone tried the Racetech Cats they are £195 + vat each ?

[Tafford]

I've got a pair of original 4.5 cats which I could be persuaded to sell. PM me if interested

[Mark.]

seanieboy said:

Mark. said:

I've got these - 200 cell. Fitted by the previous owner and manufactured down here on the south cost. I don't even know if the company exists anymore but I can check out the paperwork for you if you like?
Passes the MOT OK on emissions and sounds wonderful even at idle.
http://www.youtube.com/watch?v=3swtDgkyE78

Thanks for the advise if you could find the paperwork that would be great and let me know cheers

Details as promised
Blackthorn Auto Catalysts
Forum House
Stirling Road
Chichester
West Sussex
PO19 2EN
0870 0101 800

Invoice date is July 2001 so not sure if they are still there/exist.

[zidmie]

I also bought these cheap cats from clickcarparts.
It decreased the noise, but noise is still nice. I don't see flames anymore when backfire.
The MOT (in France) was OK.
But I've the feeling I've lost quite a lot of power (I'll check the difference when I'll remove them).

[Allandwf]

I put MIJ sport ones on wifes ML55 AMG, were ok, though emmissions borderline now,but still passes.

[Mr Cerbera]

Hiya ,

When I was looking to replace mine (MOT emissions) I looked on Ebay here and a very resourceful chap, on that site, told me that the 'cheap' ones were not suitable for my Cerb's year of manufacture (2001) he then pointed me to the correct article and it passed no probs.

They are well-worth contacting.

HTH