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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 TWO O2 SENSOR CONNECTIONS which means you are ready to add a performance header (relocating the factory second O2 sensor after the converter in this midpipe avoids 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.
SORRY, NOT CARB APPROVED FOR CALIFORNIA RESIDENTS, WE CANNOT SHIP TO A CALIFORNIA ADDRESS.
INSTRUCTIONS....see installation instructions in our forum in the Instructions Section, RoadsterSport Midpipe install page 4 and beyond...and note this unit is plug and play on Manual Transmission cars, we have NOT fit it to Automatic cars.
All install hardware is included.
STR LEGAL under Class Rules Update 2012. Pursuant to SCCA 14.10.E: our cat fits entirely in the space that the factory cat occupied pursuant to SCCA 14.10.E....and maker certifies the core for use in any application up to 6.2L and 6000 pounds. Core has 25,000 mile manufacturing defect warranty (no core warranty for boosted or track cars), and the rest (including housings) are stainless and include a lifetime warranty.
BRIAN'S APPLICATION NOTES: I love the sound of this midpipe in combination with our RoadsterSport Helmholtz mufflers, adds burble and throatiness when you push toward redline and helps control the off throttle resonance these motors will otherwise make. We could have done a cheaper midpipe, but we decided to do the best for those of you who demand the best. This is the midpipe we run on both our Turbo ND and our Supercharged ND for max power!