Exhaust & emissions for Miata NA / NB
3 matching parts guides.
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NA/NB Miata Oxygen Sensors, Manifolds and Catalytic-Converter Fitment
US-market 1990-1993 NA6, 1994-1997 NA8, 1999-2000 NB1, and 2001-2005 NB2. Split by OBD era, sensor position, federal/California emissions label, and exhaust layout. Mazdaspeed is excluded.
View guide2001-2002 NB Miata EVAP Purge Valve, Canister, CDCV and Fuel-Cap Diagnosis
US-market 2001-2002 NB Mazda Miata Base, LS and SE with the naturally aspirated 1.8L engine and OBD-II CDCV/FTP vacuum-monitor EVAP system. The checked catalogs do not branch these listed EVAP identities by California versus Federal emissions, but record the underhood emissions label and verify VIN before ordering. Exclude 1996-1997 late NA, 1999-2000 NB, 2003-2005 NB, all Mazdaspeed/turbo cars, non-US cars and swaps.
View guideUS NA/NB Mazda MX-5 Miata Factory Rear Muffler-with-Pipe and Main-Silencer Identification
US 1990-1997 NA and 1999-2005 NB Mazda MX-5 Miata factory naturally aspirated rear muffler-with-pipe/main-silencer branches only. Match generation, production, engine/turbo status, transmission, emissions equipment, upstream flange, hangers and bumper-tip interface. Exclude the US 1998 gap, 2004-2005 Mazdaspeed turbo, NC/ND, non-US/RHD assumptions, manifolds, front pipes, catalysts, oxygen sensors, universal/race systems and cut-and-weld conversions.
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