RoadsterSport MaxMidpipe - ND

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$899.00 $749.00
(You save $150.00)

The ONLY full 5 inch diameter body ultra highflow 200 CPI Spun Metallic Converter ND Midpipe on the market. Most other choices on the market are 4 inch body cats, this 5 inch body design flows massively better. The math tells you the big news here: area of a 4 inch circle is 12.6 square inches, area of a 5 inch circle is 19.63 square inches, which means our 5 inch body Converter flows nearly 60% better than a 4 inch design!

Combined with 2.5 inch stainless piping and Monster Magnaflow high density non-fiberglass resonator. Resonator will not pack out, will not burn out, no fiberglass packing in this midpipe (unlike EVERY other midpipe on the market). Made to last in all stainless steel. Simply the best flowing high performance and longest life ND Midpipe available.

Mazda gave us a serious challenge with the ND midpipe design but we got it figured out, and now we introduce this second generation ND Midpipe with the best of everything included! Instead of the small ball/socket outlet of the stock midpipe we convert to a flat flange so we can carry more flow all the way out through any of our RoadsterSport mufflers. That means this midpipe ONLY works with our RoadsterSport brand mufflers (the only way to have smooth 2.5 inches of flow all the way). To replace the function of the ball/socket connection but allow for greater flow we use a stainless flex joint. The stainless flex joint adds significant costs but was the best way to max flow and performance all the way out (most other brands pinch the flow to keep the stock flange connection to muffler).

We also stuff the largest and highest density packing stainless resonator that can fit neatly up under the Miata so that even with greater diameter and flow the sound is mellow and fun, not harsh and abrasive.

All Mandrel bent tube with no tight bends to slow flow, see the picture and notice how smooth and flowing the bends are!

Designed as a bolt-on replacement for the factory midpipe to carry higher flow from larger pipe size all the way out any of our RoadsterSport mufflers.

INCLUDES O2 SENSOR CONNECTION AFTER CONVERTER which means you are ready to add a performance header (relocating the factory second O2 sensor after the converter in this midpipe to help avoid codes.).

Uses high quality SPUN catalytic converter with metal core. Despite presence of converter this unit is not CARB approved...which makes it legal in California only for off-road/race track use). Uses monster size resonator because when you uncork this ND MX5 Miata motor it wants to get loud unless you use a resonator this large (by comparison stock resonator is much smaller).

Despite very large resonator, this midpipe will raise the final sound level because of the much higher flow.

Weight: 20.75 lbs


1 Review

  • 5
    Excellent flow quality and power

    Posted by Darkvader75 on Aug 11th 2022

    This is the perfect midpipe for 49 states. Extreme flow excellent materials and connects perfectly to it's mated parts from Roadster Sport