yeh mine goes through easy no manifold cat ,oem second cat, super200 Colbert back box
i have access to emissions testing at MOT station and the only time its been borderline is when the car has been cold as long as the car is up to temp its ok
I’m afraid it’s your view that is incorrect. The MoT testing guidance states:
8.2.1.1. Exhaust emission control equipment
You only need to check components that are visible and identifiable, such as catalytic converters, oxygen sensors, and exhaust gas recirculation valves.
You should reject all vehicles first used on or after 1 September 2002, where original emissions control equipment components are missing, obviously modified or obviously defective.
=======================
The issue here is that if the MoT tester is familiar with the vehicle in question and notices that a catless manifold has been fitted, it will fail before any emissions are tested. As a component in indeed missing.
So the fitment of a catless manifold becomes more of a game of chance come MoT time. Simple as that.
I’m in the same camp with this, just to say, as I have the IL Motorsports manifold fitted to mine
I didn’t want to take the risk so went with the BBR manifold with the cat. The car sailed through its recent mot. Oh, also had the 200 upgrade with their GT rear silencer. I liked the car before but I absolutely love it now!
Touch wood mine has passed its last 5 MOTs since having the catless IL Motorsport 4-1 was fitted, but I do have the OEM manivertor stored away just in case.
From what I can see, it should be fine to run the non-catted manifold, but like with all modifications it is at my own risk.
I will not be using a Mazda main dealer to do the MOT any time soon…!
If you do have actual experience of running a non-catted manifold, then I am still keen to hear from you.
Otherwise, we can let the argument about rules and regs of MOT testing lie, as I didn’t really ask for that. But thankyou anyway for your time and attention. It’s been really insightful.
One of the most important points to make here, and for others who may find this thread in the future, is you can’t have the question about the fitment of a catless manifold, without discussion/awareness of the potential for MoT issues.
You ‘should’ be fine, but in choosing to fit a certain type of manifold, you are introducing the potential for an issue to crop up at MoT testing time. I can’t really put it any more simply than that.
Hi Anthony, I run two MX-5 MK3s 2.0, one with the BBR Catted Manifold and one with the BBR non-catted Manifold. Both also have the BBR center section with the 200 cel sports cat and BBR cams amongst other mods etc., Both have passed the last 4 or so MOTs without issue. This question always creates a battle. Please don’t ask for what oil you should use or what tires you should buy, if you do get ready for it Hope this helps
Have just picked up on this thread from last year having had my 2012 NC fail its MOT on emissions.
I’ve just had the BBR 200 kit fitted few weeks ago with catted manifold and GT catted exhaust system.
No idea why but even running it hot twice attempted, it barely scrapped through as a friend was testing it.
Am just seeking any thoughts out there as to why this might have happened?
Am I correct in saying you have TWO sports cats fitted by BBR and it’s still borderline in passing!
Doesn’t seem right to me even getting them very hot before the test.
I have a decat manifold and the original central cat and passes every year.
BBR exhausts can be part of the problem with MOT emissions readings. The way the pipes join is different than OEM (not spring loaded) and the gaskets can leak, messing up the lambda reading. I’ve got a spare set of gaskets now, just in case.
Please don’t ask for what oil you should use or what tires you should buy, if you do get ready for it 