I have been looking into these,but are any of you running high bhp applications using one of these.
And if so i take it they dont pass emissions come MOT time due to the tuning on the car.
Mine will be running 400+bhp when its done and the only reason i would want one is so i dont have to mess around come mot time.

yup, I am on a Graham Goode racing cat 100 CPI.

It passes the emissions by a mile ( now it has been mapped properly )

It used to fail a few times on hydrocarbons, simply because the engine was literally pushing fuel through the exhaust.

I'm up to about 440hp ( at 1.2 bar ), on the road, I hold about 1.5 bar, so the hp is probably a tad higher, torque is deffo hard.

I may one day fit the cat bypass pipe & let flea map it, but it's my manifold that restricts the flow, NOT the CAT

also forgot, running without a CAT could land you in trouble if the VOSA scum pull you over....

My coupe runs a few extra bhp and its mapped with no cat,

It passed the mot this march with a 100cell race cat on,

Ben

Yeah i hear the 100 cells are not restrictive so shouldnt cause too much in the way of a restriction.

Where does one stand if you get caught without a cat.?
You would have to be very unlucky to get caught.

Apparently my car came with one of these complete with stainless steel exhaust. Receipt for over £600 in the folder. The car always felt that bit extra & passed the emissions test at MOT time....

Anybody got a link for the race cats ?
Be interesting to see.

i would be using the blue flame one
there listed on ebay but buy direct.

Do race cats stuff up the seals on standard turbos like a decat does?

It has less back pressure so while its not as bad its probably a matter of time. Seals can go just from the increased boost with the cat on. My seals did at 1.2 bar.

cats2u.co.uk seem to have these.

Cat what cat, mine seems to pass every year

A de-cat will be about £400 cheaper and for the sake of 1/2 an hours work at MOT time, id go cat-less

Unless you know the mot person and he's passes it with a decat on

Ive spoken to guys who have "genuinely" passed MOT's with decats, if thats true then the 20VT emissions must be very good...that or some guys just turn a sympathetic blind eye

Got the link Johnny ?
Got it......is it this one ?
http://cgi.ebay.co.uk/BLUE-FLAME-ST...Vehicles_CarParts_SM?hash=item3c9f6ead7c
Paul

yeah thats the one.
Alot cheaper from Blueflame direct though.

Decats dont pass Mot's so i would seriously question the tester or the car.
In over 7 years of mot testing i never saw a decat pass emissions,

My ex's Punto 1.8HGT Abarth passed without a cat on, and had the emissions trace to prove it, apart from the de-cat (and honking great huge exhaust), the car was standard though.