Catalytic Converters

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We offer both the original equipment MAZDAconverters, and after-market replacement units. The after-market units are direct replacements, and are 50 STATE LEGAL.
For specific years/models where both are not listed, it is due to either the after-market ones not being available, or they are more expensive than the factory ones.

All "replacement" (aftermarket) main converters are "high-flow" -- meaning they flow better than the Mazda original ones.

79 and 80 Headpipe 40-620A-8871
Heat Exchanger 40-3200-8712
81 and 82 MAZDA monolithic (first) converter 40-4000-N201
MAZDA main converter 40-3000-N231
Replacement main converter MZ1925
83 12A MAZDA monolithic (first) converter 40-4000-N231
MAZDA main converter 40-3000-N231
Replacement main converter MZ1925
84 and 85
(12A only)
MAZDA first mono. from 2/84, w/ tube 40-780C-N249 
MAZDA monolithic(second, M/T) 40-400B-N249
Replacement (second, M/T) MZ4185
MAZDA monolithic (second, A/T) 40-400B-N250
Replacement (second, A/T) MZ4182
MAZDA main converter 40-3000-N304
Replacement main converter MZ1926
84 and 85 13B GSLSE MAZDA monolithic (first) converter 40-7800-N305
MAZDA monolithic (second) converter 40-400B-N249
MAZDA main converter 40-3000-N304
Replacement main converter MZ1926
86 through 88 Non-turbo MAZDA monolithic (first, M/T) 20-500A-N326
MAZDA monolithic (first, A/T) 20-5000-N327
MAZDA monolithic (second) 20-5500-N326
Replacement (second) MZ4193
MAZDA main converter 20-600A-N326
Replacement main converter MZ1927
89 through 92 Non-Turbo
(Note: These do not use a "first monolithic")
MAZDA mono ("second") converter 20-550A-N350
MAZDA main converter 20-600A-N350
Replacement main converter MZ1927
86 through 88 Turbo MAZDA monolithic converter 20-5000-N332
Replacement monolithic converter MZ1942
MAZDA main converter 20-6000-N332
Replacement main converter MZ1927
89 through 92 Turbo MAZDA monolithic converter 20-500A-N370
MAZDA main converter 20-6000-N370
Replacement main converter MZ1927
93-95
w/Manual Trans
MAZDA monolithic converter 20-5000-N3A1
MAZDA main converter 20-600A-N3A1
93-95
w/Automatic Trans
MAZDA monolithic converter 20-5000-N3A2
MAZDA main converter 20-600A-N3A2


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Mazdatrix Home Page Click part number for price View Cart