Technically it probably needs to be E marked and documented legal, but I doubt it would ever be checked unless the MoT changes to become more like some European tests.

Shouldn’t affect the MoT emissions providing that it’s working properly (may depend on the quality), will need to be hot though.

You may well need a MiL eliminator.

 

Easier to just buy a decat and swap it out for the MOT then back on straight aftetwards.

 

Not always.... some exhausts with a Decat are just TOO loud.

 

I have one on mine with a TT7/4. Cant comment on the legality (other than the label on the cat that said something like for race use only!). But it passed an MOT OK.

I have had a Z&F remap and Mark includes something in the remap to get round the MIL but the light did come on soon after the cat and exhaust were fitted.

You should probably advise your insurers too.

 

Maybe this might help:
http://www.mgf.ultimatemg.com/group2/exhaust/catalysts.htm

 

We have the Janspeed sports cat and the car has past its last two MOT's with flying colours. Although not sure what the emissions legislation is for later cars.

 

I got rid of mine as I got sick of always just scraping through after an Italian tune up. Replaced it with a standard cat and haven't noticed much difference.

 

Janspeed sports cats are stamped track use only,
They are a 200 cell cat, you can get a 400 cell sports cat from viper in Essex

 

http://www.mgfcentre.com/store/exhaust-systems/137/sports-cat-mk2.html

I have this on my 135 and it has passed 2 MOTs since being fitted.

 

Thanks for your comments and help one and all, I may give it a go, but I may not, haven't decided yet.

 

Kevin, I have a standard decat pipe fitted, and I refit the cat for the MOT. As the car isn't a daily drive I have no problems

The de cat pipe works well with the Scorpion IMO

 

Thanks Andy. I'll give it a few days thought and make my mind up.

Definitely going to get some handling upgrades

 

I've got a Janspeed sports CAT.. But as I'm running an Emerald ECU I can change the map on arrival at the MOT station to pass the emissions test..

 

Hi Kev,

Ive just got a SS decat pipe with a threaded hole just to hold the sensor safely. I Just swap it back to the cat for the mot. Remap means the sensor is disabled. Sounds epic with my scorpion and when Beetlefan was following me through a tunnel last year, he said it was spitting flames on the over run

I asked the same question as you about the effectivness and legality of a sports cat on here a while ago and got a load of conflicting answers so gave up and just spent £35 on a decat pipe and am risking the legal bit.

 

Hi Dave, yes, that's what Ceege has done and it sounds great. Don't fancy having to keep changing for the mot though, hence my question on emmisions. On Mike Saturs site it says that new legislation states sports cats should only be fitted to cars registered before March 2001. Flippin EU i bet!

 

Our ST sounds nice with the 5 cylinder engine and I guess that's why they did it as it would be one of the first complaints about the new ST if it didn't sound sporty when they went to a 4 cylinder engine.