with Federal/California Emissions System Not legal for sale or use in California and other CARB-compliant states. Legal in Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details. Standard Universal Type Modifications and/or Additional Parts May Be Required for Installation
Undercar Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with CA Emissions)
with Federal/California Emissions System Not legal for sale or use in California and other CARB-compliant states. Legal in Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details. Standard Universal Type Modifications and/or Additional Parts May Be Required for Installation
Cutting and Welding Required
Undercar Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with CA Emissions)
with Federal/California Emissions System Not legal for sale or use in California and other CARB-compliant states. Legal in Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details. Ultra Universal Type Modifications and/or Additional Parts May Be Required for Installation
Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with CA Emissions)
Not legal for sale or installation in California, Colorado or New York. Cutting and Welding Required
Not legal for use in California Illegal for installation in NY on vehicles equipped with California emission systems
Cutting and Welding Required
Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with CA Emissions)
Federal, 47-State Only, Not legal for sale in CA, NY or ME Direct Fit
Not legal for sale or installation in California, Colorado or New York.
CARB Executive Order D-193-97 Engine Family Number (EFN) WFMXT04.0AAA Cutting and Welding Required Oval Shaped Clam-Shell Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
Round Body CARB Executive Order D-193-97 Engine Family Number (EFN) WFMXT04.0AAA Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-143 Engine Family Number (EFN) 7FMXT04.02EG
CARB Executive Order D-193-96 Engine Family Number (EFN) 1FMXT04.01F6 Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-143 Engine Family Number (EFN) 7FMXT04.02EG Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-96 Engine Family Number (EFN) 1FMXT04.01F6 Cutting and Welding Required
CARB Executive Order D-193-97 Engine Family Number (EFN) WFMXT04.0AAA Cutting and Welding Required Oval Shaped Clam-Shell
Not legal for use in California Illegal for installation in NY on vehicles equipped with California emission systems
Round Body CARB Executive Order D-193-97 Engine Family Number (EFN) WFMXT04.0AAA Cutting and Welding Required
Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with CA Emissions)
Direct Fit; Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details. Federal and California Emissions
CARB Executive Order D-193-101 Engine Family Number (EFN) 4FMXT04.02KM Engine Family Number (EFN) 4FMXT04.02K2 Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-182-69 Engine Family Number (EFN) 4FMXT04.02KM Legal for sale and use in California and other states requiring CARB-compliant replacement converters. Consult the aftermarket converter regulations in your state for details. Universal Type Modifications and/or Additional Parts May Be Required for Installation
CARB Executive Order D-193-97 Engine Family Number (EFN) WFMXT04.0AAA Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-101 Engine Family Number (EFN) 4FMXT04.02KM Engine Family Number (EFN) 4FMXT04.02K2 Cutting and Welding Required
CARB Executive Order D-193-97 Engine Family Number (EFN) WFMXT04.0AAA Cutting and Welding Required
776 Series 4 in Round Body Engine Family Number (EFN) 7FMXT04.02EG CARB Executive Order D-798-15 ; Universal Fit - CARB Legal Note: In Compliance with CARB Emissions Requirements 2.25 in Inlet ID; 2.25 in Outlet ID; w/Midbed O2 Fitting ALL
CARB Executive Order D-193-146 Engine Family Number (EFN) 4FMXT04.02E2 Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-146 Engine Family Number (EFN) 4FMXT04.02E2 Cutting and Welding Required
Not legal for sale or installation in California, Colorado or New York.
CARB Executive Order D-193-143 Engine Family Number (EFN) 7FMXT04.02EG Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-143 Engine Family Number (EFN) 7FMXT04.02EG Cutting and Welding Required
CARB Executive Order D-193-143 Engine Family Number (EFN) 7FMXT04.02EG
CARB Executive Order D-193-143 Engine Family Number (EFN) 7FMXT04.02EG Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
Undercar Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with CA Emissions)
Undercar Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with CA Emissions)
Not legal for sale or installation in California, Colorado or New York. Cutting and Welding Required
Cutting and Welding Required
Not legal for sale or installation in California, Colorado or New York. Cutting and Welding Required
Not legal for sale or installation in California, Colorado or New York. Cutting and Welding Required
Cutting and Welding Required
Not legal for sale or installation in California, Colorado or New York. Cutting and Welding Required
Cutting and Welding Required
Cutting and Welding Required
Cutting and Welding Required Not legal for sale or installation in California, Colorado or New York.
CARB Executive Order D-193-104 Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-104 Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-104 Cutting and Welding Required
CARB Executive Order D-193-104 Cutting and Welding Required
Undercar Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with CA Emissions)
Cutting and Welding Required
Cutting and Welding Required
Cutting and Welding Required Not legal for sale or installation in California, Colorado or New York.
Cutting and Welding Required Not legal for sale or installation in California, Colorado or New York.
Cutting and Welding Required
Cutting and Welding Required
Cutting and Welding Required Not legal for sale or installation in California, Colorado or New York.
Cutting and Welding Required
Direct Fit; Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details. Federal and California Emissions
Undercar Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with CA Emissions)
91 Series Engine Family Number (EFN) TFM4.028G2EK CARB Executive Order D-280-101 ; Universal Fit - CARB Legal Note: In Compliance with CARB Emissions Requirements 2.25 in Inlet ID; 2.25 in Outlet ID; Round Body; 16 in OAL ALL
CARB Executive Order D-193-97 Engine Family Number (EFN) SFM4.018G1EK Cutting and Welding Required
CARB Executive Order D-193-97 Engine Family Number (EFN) SFM4.018G1EK Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-104 Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-104 Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-104 Cutting and Welding Required
CARB Executive Order D-193-104 Cutting and Welding Required
Not legal for sale or installation in California, Colorado or New York.
Not legal for sale or installation in California, Colorado or New York.
CARB Executive Order D-182-69 Engine Family Number (EFN) SFM4.028G1EK Legal for sale and use in California and other states requiring CARB-compliant replacement converters. Consult the aftermarket converter regulations in your state for details. Universal Type Modifications and/or Additional Parts May Be Required for Installation
CARB Executive Order D-193-103 Engine Family Number (EFN) 3FMXT04.02FA Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-103 Engine Family Number (EFN) SFM4.028G1EK Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-103 Engine Family Number (EFN) SFM4.028G1EK Cutting and Welding Required
CARB Executive Order D-193-103 Engine Family Number (EFN) 3FMXT04.02FA Cutting and Welding Required
Not legal for use in California Illegal for installation in NY on vehicles equipped with California emission systems
775 Series Engine Family Number (EFN) 4FMXT04.02KM CARB Executive Order D-798-14 ; Direct Fit - CARB Legal Note: In Compliance with CARB Emissions Requirements ALL
Not legal for use in California Illegal for installation in NY on vehicles equipped with California emission systems Federal Emissions
CARB Executive Order D-193-101 Engine Family Number (EFN) 4FMXT04.02KM Engine Family Number (EFN) 4FMXT04.02K2 Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
Direct Fit Federal, 47-State Only, Not legal for sale in CA, NY or ME
Not legal for use in California Illegal for installation in NY on vehicles equipped with California emission systems
with California Emissions System Not legal for sale or installation in California, Colorado or New York.
Undercar Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with CA Emissions)
Direct Fit; Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details. Main Direct fit unit contains front and rear converter body. Only failed converters may be replaced. Federal and California Emissions
CARB Executive Order D-193-103 Engine Family Number (EFN) WFMXT04.0DAA Engine Family Number (EFN) WFMXT04.0EAA Cutting and Welding Required
CARB Executive Order D-193-103 Engine Family Number (EFN) WFMXT04.0DAA Engine Family Number (EFN) WFMXT04.0EAA Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-103 Engine Family Number (EFN) SFM4.028G1EK Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-103 Engine Family Number (EFN) 1FMXT04.02F5 Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
Direct Fit; Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details. Direct fit unit contains front and rear converter body. Only failed converters may be replaced. Federal and California Emissions
Undercar Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with CA Emissions)
Direct Fit; Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details. (01-03 B4000) Direct fit unit contains front and rear converter body. Only failed converters may be replaced. Pre-Cat Federal and California Emissions
CARB Executive Order D-193-96 Engine Family Number (EFN) 1FMXT04.01F6 Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-96 Engine Family Number (EFN) 1FMXT04.01F6 Cutting and Welding Required
CARB Executive Order D-193-101 Engine Family Number (EFN) 4FMXT04.02KM Engine Family Number (EFN) 4FMXT04.02K2 Cutting and Welding Required
with California Emissions System
CARB Executive Order D-193-146 Engine Family Number (EFN) 4FMXT04.02E2 Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-146 Engine Family Number (EFN) 4FMXT04.02E2
CARB Executive Order D-193-103 Engine Family Number (EFN) 1FMXT04.02F5 Cutting and Welding Required
CARB Executive Order D-193-103 Engine Family Number (EFN) SFM4.028G1EK Cutting and Welding Required
Direct Fit; Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details. Pre-Cat Federal and California Emissions
Undercar; Front Y-Pipe Unit Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with CA Emissions)
Not legal for sale or installation in California, Colorado or New York.
Not legal for sale or installation in California, Colorado or New York.
Not legal for sale or installation in California, Colorado or New York.
CARB Executive Order D-193-103 Engine Family Number (EFN) WFMXT04.0DAA Engine Family Number (EFN) WFMXT04.0EAA
CARB Executive Order D-193-103 Engine Family Number (EFN) WFMXT04.0DAA Engine Family Number (EFN) WFMXT04.0EAA Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
Not legal for sale or installation in California, Colorado or New York.
Not legal for sale or installation in California, Colorado or New York.
Not legal for sale or installation in California, Colorado or New York.
CARB Executive Order D-193-146 Engine Family Number (EFN) 4FMXT04.02E2 Cutting and Welding Required
CARB Executive Order D-193-146 Engine Family Number (EFN) 4FMXT04.02E2 Cutting and Welding Required Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
Not legal for sale or installation in California, Colorado or New York.
CARB Executive Order D-193-101 Engine Family Number (EFN) 5FMXT04.02KM Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-101 Engine Family Number (EFN) 5FMXT04.02KM
CARB Executive Order D-193-103 Engine Family Number (EFN) SFM4.028G1EK
CARB Executive Order D-193-103 Engine Family Number (EFN) SFM4.028G1EK Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-97 Engine Family Number (EFN) 1FMXT04.01F6 Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-97 Engine Family Number (EFN) 1FMXT04.01F6
CARB Executive Order D-193-101 Engine Family Number (EFN) 4FMXT04.02KM Engine Family Number (EFN) 4FMXT04.02K2
CARB Executive Order D-193-101 Engine Family Number (EFN) 4FMXT04.02KM Engine Family Number (EFN) 4FMXT04.02K2 Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-103 Engine Family Number (EFN) WFMXT04.0DAA Engine Family Number (EFN) WFMXT04.0EAA Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-103 Engine Family Number (EFN) WFMXT04.0DAA Engine Family Number (EFN) WFMXT04.0EAA
CARB Executive Order D-193-97 Engine Family Number (EFN) 1FMXT04.01F6
CARB Executive Order D-193-97 Engine Family Number (EFN) 1FMXT04.01F6 Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-97 Engine Family Number (EFN) SFM4.018G1EK
CARB Executive Order D-193-97 Engine Family Number (EFN) SFM4.018G1EK Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-146 Engine Family Number (EFN) 4FMXT04.02E2 Legal For Sale In All 50 States Including California, Colorado and New York (CARB Certified)
CARB Executive Order D-193-146 Engine Family Number (EFN) 4FMXT04.02E2
Browse our selection of quality catalytic converter parts designed specifically for your Mazda B4000. We carry options across multiple trim levels, body styles, and engine configurations to ensure a perfect fit.
Base · DS · LE · SE · Troy Lee
Extended Cab Pickup · Standard Cab Pickup
V6 4.0L
Automatic · Manual
