recycled
MB Enthusiast
bit of a grey area this one.
better talk to your MOT station
better talk to your MOT station
robert.saunders
MB Enthusiast
AFAIK a cat is not legally required, but your emissions (which obviously must meet a certain level) may therefore be your point of fail at MoT.
panason1c
MB Enthusiast
As already mentioned, the actual presence of a cat is not legally required but your car's emmisions will be tested as if a cat was present and i personally doubt that it will pass the emmisions test without the cat.
Putting it back on once a year would be your only option i'm afraid.
Putting it back on once a year would be your only option i'm afraid.
recycled
MB Enthusiast
there are people on here that have decatted a CLK and passed the MOT .
Do a search for cats
http://www.mbclub.co.uk/forums/showthread.php?t=42175&highlight=catalytic+converters
Do a search for cats
http://www.mbclub.co.uk/forums/showthread.php?t=42175&highlight=catalytic+converters
Bazzle
Active Member
- Joined
- May 27, 2005
- Messages
- 445
- Location
- Melbourne, Australia
- Car
- SLK230 1998 auto, 2006 W169 A200 Sport
Why would you want to remove anyway. ?
i fitted high flow to my slk and it evens sounds better, still legal etc
bazzle
i fitted high flow to my slk and it evens sounds better, still legal etc
bazzle
GrahamC230K
MB Enthusiast
- Joined
- Jul 14, 2002
- Messages
- 9,755
- Car
- Audi A3 & S4 quattro
I now understand (learnt through the forum) you don't NEED the cat to pass, as above said down to emissions.
What route you take is proably down to your cash and who is doing the work (I figure more than one attempt always going to cost more):
1, You could try a complete decat with some "test pipes" and see how the emissions are.
or
2. Go with higher flow cats.
I believe the resistance (for want of correct term) is measure in CPI (cells per inch).
Identify what CPI your cats are and reduce them.
On the Audi my precats (2) were 200CPI and my primary cats (2) 400CPI. I removed the precats and had 200CPI primary cats fitted (happended to easily be sourced from an RS model).
You can get 100 CPI cats which will still get you emissions low enough but they are expensive and noisier.
I'd investigate loosing precats and going for a lower CPI rated primary cats.
What route you take is proably down to your cash and who is doing the work (I figure more than one attempt always going to cost more):
1, You could try a complete decat with some "test pipes" and see how the emissions are.
or
2. Go with higher flow cats.
I believe the resistance (for want of correct term) is measure in CPI (cells per inch).
Identify what CPI your cats are and reduce them.
On the Audi my precats (2) were 200CPI and my primary cats (2) 400CPI. I removed the precats and had 200CPI primary cats fitted (happended to easily be sourced from an RS model).
You can get 100 CPI cats which will still get you emissions low enough but they are expensive and noisier.
I'd investigate loosing precats and going for a lower CPI rated primary cats.
