Decat and mot

[AndyBrown]

Need a bit of advice please, I've tried searching but can't find what I'm looking for.

I'm going to take part in the group buy for BCS for a cat back and the loon to get downpipe and decay in a few month time.
Now I'm aware hat a decaf will cause an mot failure due to emissions but what's the solution to the problem, apart from a friendly mot tester.

I've seen the Eurojet has a vband system so you can fairly easy swap the decat to a sports cat but what's the solution for other downpipes?

Thanks

[rich83]

Nige could make one for you that is modular so you an take the cat off... but its gonna cost you.

[xjay1337]

MOT car. Fit decat next day.
Easy.

[AndyBrown]

I was thinking of BCS cat back and eurojet downpipe, but will there be any difficulty joint them?

MOT car. Fit decat next day.
Easy.

What about the following year tho? Keep standard downpipe and refit it again?
Need to find myself a relaxed MOT place lol

[Powervalve Nige]

Back in the early days Sports cats were small and inefficient in terms of volume throughput and emissions.
our cat has a 125mm cross section with a 77% open area in pure maths terms this equates to a ratio of over 90mm of flow, even allowing for the friction and drag coefficient the laminer flow will more than equate to a cat delete, thereby negating the need for a de cat unless for purely economic reasons. 
Cheers
Nige

[xjay1337]

Just find a Ford Fiesta and stick the pipe up there. The first time is a pain (things get stuck and snap) but if you've put hi temp anti seize on everything when you put it together, you can drop the whole downpipe in about 15 minutes.

Nige I have always wondered about sports cats passing an MOT. So you're saying on your system at least, there's no benefit to having a de-cat for performance? And what about passing MOT's.

[Powervalve Nige]

The key is the pm coating - we coat with 30grms which should be good for 8-10 years, and ours sails through an MOT.
Theoretically a  cat will pass with 5grms of PM - but the problem is with entropy the coating degrades to the point where it will not pass usually after 2-3 years.
The maxim is if the cat DP is cheap then the PM loadout is low - they are called precious metals because thats what they are, and they are expensive.
Cheers
Nige

[rich83]

Platinum?

[Powervalve Nige]

platinum (Pt), palladium (Pd), and rhodium (Rh) 

[rich83]

It would be quite cool if you posted photos of the internal of your exhausts  Cats and Silencers.... put it in the showcase section. 

[56OctyVRS]

My 200 cel BCS motorsport cat sailed through the MOT and still is with its new owner.

[th3_f15t]

For the minor increases in performance with a decat system over a sport cat system being over shadowed by the yearly job of refitting a stock exhaust just for a day, in my mind, makes it a no brained to get a sports cat

[Markweir12]

Mine will be for sale at end of month