SOLD: MSM Downpipe - Aftermarket with cat
 

For Sale: Aftermarket downpipe for Mazdaspeed Miata.

This started out as a catless eBay downpipe that I ran for 5 years as-bought. Really helped spool and overall throttle response. I got sick of the smelly exhaust and later decided to add a cat that was professionally installed early last year.
Catalytic converter is a Magnaflow spun metal cat with 2.5" inlet/outlet and 4" body; model 54956 (linky). Fits perfect in the space with the stock mid-chassis bracing, as shown in photos.
It has two O2 sensor bungs, one at the rear behind the cat for the OEM rear sensor, and another one near the middle at the top for a wideband. One plug will be included (two shown here, but I need to keep one for my other downpipe).
Inside diameter for the inlet and outlet are 2.25" versus 1.9" in / 2.24" out for the stock part. Overall weight of this one is 7.4 lbs with the cat vs 16.4 lbs stock.

No issues with fitment, leaks, or cracks. Various gaskets are included for install, some have been used.
This will only fit your car if it has an MSM midpipe or some other custom solution due to the different flange locations vs non-turbo NBs. If you've somehow cobbled an MSM turbo and manifold onto your NB, this downpipe won't fit with your stock midpipe.

I'm only selling because I moved to a full RoadsterSport setup.


SOLD
Located in Phoenix, AZ area for pickup

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Bump, still available

Bump

Also adding old video for sound test. Not completely applicable to this part in its current configuration though. This was with the downpipe in catless setup, with stock midpipe and stock MSM muffler.

Bump. Still available

Put this up for sale on the Mazdaspeed MX-5 Owners Facebook page and it should sell quick at that price. I listed an older Ebay stainless DP (no cat) last month there and it sold in less than 12 hours.

Thanks for the tip. I saw the price you listed yours for and that made me do a double-take, because I remember what I paid for this part when it was new...

I ended up selling the FM exhaust and the Ebay DP for $600 together. If I remember correctly, I bought the DP for like $99 off Ebay and the FM exhaust used for $400 back in 2014.

SOLD