Enforcement Discretion for California-approved Aftermarket Catalytic Converters for Vehicles with On-board Diagnostic Systems

EPA will allow the sale and installation in federal areas of aftermarket catalytic converters that have been approved by California under their AMCC/OBD-II procedures. Issued Sept. 30, 2004.

• Enforcement Discretion for California-approved Aftermarket Catalytic Converters for Vehicles with On-board Diagnostic Systems (pdf) (845.61 KB)