MX5 2006-2012: Exhaust

RoadsterSport Stainless MX5 Miata Midpipe :: 06-12

Part Number: 60-1328

Application: 06-12

Price: $399.00

Quantity:

Designed to work with our RoadsterSport Duals or RoadsterSport Race muffler as a simple bolt on (will also bolt up to our Racing Beat exhaust, MazdaSpeed exhausts, and all headers that we sell etc.).

Our midpipe gains 5 to 8 Ft/Lbs of torque from 3500 rpms through 6000 rpms, see our forum for dyno sheets. All stainless steel construction for years of driving pleasure. This MX5 Miata midpipe is slightly larger diameter than stock at 2.5 inches all the way through. Uses high quality SPUN catalytic converter with metal core (despite presence of converter this unit is not CARB approved). Uses monster 18 inch resonator because when you uncork this NC MX5 Miata motor it wants to get loud unless you use a resonator this large (by comparison stock resonator is about a foot long).

Stock midpipe is 20 pounds, our midpipe is 16.5 pounds for total savings of 3.5 pounds. Despite very large resonator, this midpipe will raise the final sound level just sightly because of the higher flow larger diameter tubing.

BRIAN'S APPLICATION NOTES: We started with the much larger "two biscuit" cat we use in the 99-05 midpipe system but I didn't like the sound quality that resulted. This small single biscuit spun unit is actually more expensive than the big metal clamshell cat we use in the 99-05 system but we did some experimenting with cats of different sizes and the short chambered spun cat helps reduce that 3000 rpm DRONE/ BOOM that this motor really wants to make on decel when uncorked. The short cat also saves another 1.5 pounds as compared with the bigger cat.

As for sound level...with the big cat the sound volume level was really unchanged as compared with the stock midpipe but we made the tradeoff decision to reduce decel drone but finish with slightly higher overall volume using the short chambered spun cat. and I think most will appreciate this choice.

SORRY, NOT FOR SALE TO CALIFORNIA RESIDENTS. INSTRUCTIONS....see installation instructions in our forum in the Instructions Section.

STR Class Rules Update. It appears our midpipe will be legal under proposed rule update for STR class. Pursuant to SCCA 14.10.E: our cat is smaller than stock but fits entirely in the space that the factory cat occupied pursuant to SCCA 14.10.E....and Magnaflow certifies CA/CE 59956 cores for use in any application <6.2L and 6000 pounds. Core has one year warranty, the rest of the stainless midpipe is lifetime warranty.

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Customer Reviews: RoadsterSport Stainless MX5 Miata Midpipe :: 06-12

BTW - the RS header and midpipe sound freakin' nasty with my Mazdaspeed rear muffler - not as loud or as ugly as the MX-5 Cup exhaust sounded, but pretty damn mean! I LOVE it! And, the Fidanza FW/Exedy clutch combo are darn near perfect.

-- Chris R.

I love the mid-pipe!! Not only is it beautiful, but it makes the sounds coming out of the 'race single' exhaust even better. The two go well together, and it mellows the decel drone a lot. I'm very happy with my purchase.

-- Pat R.

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