Kiwi-S2000

Rrrr the smell of petrol

Boab01

Oh man, put a decat on

Just get a friendly tester who will put yours on for the emissions test and then swap it back when they're done. My dealer will do this for me (when I get a decat for the FD2)

MB

I just leave mine in the boot and give them a wink

s2konroids

Heres a question how lean do you run with a decat?

cheers

MB

No more lean that would cause a problem.

This isn't a turbo car.

And even they can generally be decatted with no issue.

apkent

As said, it isn't illegal to take the test with a decat, so long as you pass the emmisions. In any case you either need to lean it out to try and pass, or put the cat back on. Of course you won't know if it'll pass until you try, so probably best to get it fitted, then taken off again afterwards.

JimUK

or just make sure you know the guy who is mot'ing it as already said!

Trackaction-Online

Leaving aside the difficulty in weakening a engine running closed loop control, if you do run it weak it will probably pass on CO but fail on lambda due to the high O2 readings

Bibbs

Mine with no cat, an SC and 750cc injectors passed.
It had the same output as my mates Aygo. Strange

S2000_FUN

If you don't have already the decat (test pipe) and you are thinking to buy, then i will propose you the Berk test pipe. It is still a cat pipe (100 cells), you will pass MOT and it has almost the same performast as the test pipe.