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Discussion Starter #1

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Can't provide much insight, but my cat is going out too :( . I am some what of a cheapskate on parts (except where it matters :wink: ). So if it were me I would have made the step over to an aftermarket cat. Here is a little write up on it, it states that it might not be such a good idea to get a completely "generic" cat. So I would search for one that is aftermarket, but that is designed more for rovers. http://www.rangerovers.net/repairdetails/catalytic.html
 

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When my cat went (in a blaze of fire, the story is around here somewhere), I decided to just cut them open, empty everything out (mostly broken bits, must have been a serious resistance to flow) and weld them back up. The car has been running great, and uses noteably less fuel, allthough I can't be sure how much is due to the empty cats, as w did a top end rebuild at the same time.
 

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Discussion Starter #4
the one reason I want the new cat is to get rid of my CHECK ENGINE light, any other ideas. Spacing out the o2 sensor was my other idea but there isnt enough room since it would be hitting the front drive shaft
 

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2002-2005 Range Rover MkIII / L322
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You could get an aftermarket cat put on from a local muffler shop.

When mine go, I'll probably just gut them and figure out a way to get that spacer to work, which might involve welding in a new bung. We don't have emissions tests here...not sure about IL though.

And before anyone gets their panties in a bunch about global warming... blow me. Sheep.
 

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Discussion Starter #6
kmagnuss said:
You could get an aftermarket cat put on from a local muffler shop.

When mine go, I'll probably just gut them and figure out a way to get that spacer to work, which might involve welding in a new bung. We don't have emissions tests here...not sure about IL though.

And before anyone gets their panties in a bunch about global warming... blow me. Sheep.
so cats from GEMS motor or a DISCO II will NOT WORK? thats what I really wanna know. If its the spacer for the pass. side, then no problem. The drivers I saw literally has no room and even if you weld a new bung, still no room unless its upside down, the muffler shop i took it to who do all sorts of these things showed me that it just wont work
 

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2002-2005 Range Rover MkIII / L322
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I dont' know about a disco II, but I would think a gems would work fine, as long as it had the after cat bung for the sensor.
 

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2002-2005 Range Rover MkIII / L322
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4.0 isn't different for sure. He's probably just doing that in hopes that someone will take his ad as the gospel and buy from him.
 

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2010-2012 Range Rover MkIII / L322
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I got around to fitting my Double S Stainless sports cats to the rest of my Double s system, and I can tell you it has made one hell of a difference to the idle, sound and general performance of the car. I'm amazed. :shock: From my paperwork, I see the cats were last replaced during 2002. I wonder how clogged up the standard ceramic cats get and what the long term environmental and financial costs could be. :?
 

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Discussion Starter #11
need to know, does a DISCO II have the same cat as our Range? I can get my hands on some DISCO II cats, need to know if it will fit, ITS JUST THE CAT, not the whole pipe that it bolts into
 

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2002-2005 Range Rover MkIII / L322
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Go look under your rig...do the cats bolt on or are they part of the downpipe?

A muffler shop that I'm sure you will be using can make any cat fit that you want with the proper adapters. If they (there's more than one you know) are incredibly cheap, then get em and slap em on. Otherwise, just get some cats from your muffler shop and have them weld them on. You can probably get some high flow cats while you're at it, and free up a little power.
 

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Are they free? Low mileage? If they have more than 50k or so on em, you might not want to bother.

How much are you getting them for? You're being awfully secretive about it.
 

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2002-2005 Range Rover MkIII / L322
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Sorry man, I wouldn't buy used cats for $50 a dozen. Check your local shops...outside of the city if you can make it out there...like Aurora or something a little more low rent... see what they'll sell you cats for vs. what you can get them for on ebay. You should be able to get new high flow cats for $50 each, shipped.
 

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You can't use the earlier (GEMS) units as shown in the second link as the holes tapped for the HO2 sensors will be too small for your Thor engine.

The first ones look OK, but do find out what they are. Are they standard ceramic type, or metallic? Believe me, it is worth getting performance cats. There is a Double S distributor in the US (or Canada) so ask around, or get a stainless system made up. Ideally you need a system either custom made while you wait, or a good quality CNC made one, otherwise you'll end up tearing your hair out.
 

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Isn't there a way to disable to rear O2 sensors in the BeCM? I thought in Aussie land they didn't use the rears?

My left cat is shot too, emissions in march. Debating/delaying on my options.
 

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Discussion Starter #20
Rich998a said:
The first ones look OK, but do find out what they are. Are they standard ceramic type, or metallic? Believe me, it is worth getting performance cats. There is a Double S distributor in the US (or Canada) so ask around, or get a stainless system made up. Ideally you need a system either custom made while you wait, or a good quality CNC made one, otherwise you'll end up tearing your hair out.
ITS OK, even though it says 96 and 97 models? what do you mean pulling my hair bc they wont last long?
 
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