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Catalytic Convertor, Aftermarket, MX5 Mk2

SKU: SI4681

Quality aftermarket replacement catalytic convertor.

This is a quality aftermarket replacement unit for the Mk2 with the one piece cat convertor and centre pipe. The existing pipe will need cutting just after the cat section and this new cat section fitting in its place whilst reusing the old centre pipe. Supplied with all the required fittings and gaskets.

Fits all Mazda MX5 Mk2 models, 1998>2000 5 speed manual transmission only, with a one piece cat and centre pipe.

Please Note: This cat is only suitable for vehicles that were registered BEFORE March 2001. After this they need to be type approved. If you have a vehicle registered after this date, please contact us as we can source them for you.

Fitting tip: Remove the complete centre section fron the car. Offer the new cat up to the old pipe ensuring that the bolted flange ends are level. Mark and cut the old pipe about half way down the straight part of the pipe. Refit using the joining sleeve and clamps provided. Please see the extra photo for a diagram of how it should fit together.


Based on 6 reviews

Pete Tandy
We had the catalytic converter removed from our MX by persons unknown. Bought this as a replacement and fitted straight on. Fortunately they didnÆt cut on the manifold side of the flange and they left enough of the rear of the exhaust to fix onto. Not had the CO levels checked but the fitting was spot on
11/05/2022 12:17:07
Charles Scott
Works brilliantly, highly recommended! My Mk2 NB 1.8S MX5, 64,000 miles from new and in immaculate condition struggled to pass its MoT for the past 7 years, finally my MoT tester said the high CO2 must be the Catalytic Converter because everything else has been changed over the years and it only failed on CO2. Fitting this replacement cat, that cost ú100 delivered, and immediately the carÆs CO2 emissions readout went from red to green! Perfect, thank you MX5 Parts. Note that I had previously changed the Lamba Sensor because the car was running a little rich which probably helped to kill the old cat over the past few years.
03/10/2021 12:17:05
Donald Leckie
I was skeptical given earlier reviews, but none were recent. My cat died, so replaced with this one a few weeks back.Went through its MOT today:fast idle CO 0.19% HC 93natural idle CO 0.22%So far so good. Assume it will be same story next year.Fit and kit is good.
03/06/2020 12:16:05
Matchimoto MX5
It does the job. No doubt on it.1°) It fits perfectly with the Centre Pipe, Aftermarket, MX5 Mk2[SI6469]. Combination of both gives you the same length than the Mazda OEM one. Easy to install, you just need joint sealer.2°) Concerning MOT (or Contrôle Technique in French language), at the beginning of the check it does not pass cause cat convertor did not reach high temperature enough to ensure a good burn process. Finally after the inspector accelerated the engine at 5000 rpm during 5 min., second check was OK (Both CO=0% / Lambda=1.030).It did the job :-)
29/07/2015 12:16:20
Paul Herbert
Likewise mine had done less than 1K miles on the car, failed it's MOT on emmisions, changed the cat, instant pass, I also wouldn't recommend this item as a replacement, spend a bit more & get a decent cat as this item just isn't up to the job, PH.
31/08/2013 12:16:27
Anders Pedersen
This catalytic convertor had little or no effect on my MX-5 at all.It fitted with no problems, and the exhaust-system was completely airtight, but the CO levels was way too high to get through the MOT test (0,7%).After mounting an original Mazda convertor the CO-levels dropped to 0,002% !I also noted that the original Mazda convertor is almost twice the size of this product...?Thankfully, MX5 Parts made me a full money refund - but even though I like MX-5 Parts and use them a lot, I cannot recommend this catalytic convertor.
13/10/2010 12:16:46

Delivery Information - MX5 Parts

We understand that its really important for you to receive your goods in a timely fashion and for a competitive price. To ensure that we can deliver this we have developed a strategic partnership with both the Royal Mail and our courier partner, Think Worldwide.

At the present time, we only offer one delivery option ‘our carrier’. We will dispatch your goods with the most suitable carrier, for main land UK deliveries this is normally Royal Mail 1st class for packages weighing under 2kg and Think Worldwide for those that are over.

Our delivery charges are based on the weight of the consignment and the destination address. For UK mainland deliveries they start at £2.95 for a package weighing under 200g and rise to a MAXIMUM of £9.95 for a package weighing 2kg or over (EXCEPT very large bulky items that have an additional shipping surcharge added). The exact delivery cost will be clearly displayed at checkout.

Delivery times are estimated at 1-3 working days by Royal Mail, and 1-2 working days by Think Worldwide for mainland UK addresses. If you order before 3pm, Monday to Friday, we will dispatch the same day. If you order after 3pm, we will try to dispatch the same day, but if we cant it will be the next working day. Items ordered after 3pm Friday or over a weekend will be dispatched Monday. Items dispatched on Friday are for delivery the following week. Items ordered over a Bank Holiday will be dispatched the next working day. MX5parts is constantly updated to keep pace with changes in our stock but demand is high and we occasionally run out of popular items. If we have run out of stock and can’t dispatch your order the next working day, we’ll email or phone you with a revised dispatch date. You can then either accept the revised dispatch date or cancel the order, as you wish. Please note, shipping times are an estimate, and can not be guaranteed. Please note that during special offer periods, dispatch of your order may be delayed slightly due to high a volume of orders.

A signature is required for ALL orders delivered by Think Worldwide. Someone must be at your delivery address to sign for your parcel between 8am and 6pm on a working day. Please send it somewhere it can be reliably signed for, like your place of work, a neighbour, or perhaps your grans. We can (but we don’t like to) ask the courier to leave your parcel without a signature. If we do this, it will be YOUR responsibility if the parcel is lost or damaged. If you want it left, you need to give us your express instructions in the ‘additional information’ box at the end of the checkout process. It would be helpful if you could also indicate exactly where the package should be left.

If you need to change your delivery address, for any packages that have been dispatched with Think Worldwide, there will be an additional charge of £9.95 if the package has already been dispatched.

Please remember, even with Royal Mail deliveries, that any items which are too large to fit through your letter box will need someone to be available to receive the delivery. If the item cannot be delivered, you will be carded and given the option of either a re-delivery or you can collect your parcel from your local post office depot.

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