FMS Performance | CA Approved Catalytic Converters      (800) 833-0945

CA Approved Catalytic Converters


CA Approved Catalytic Converters 1-800-833-0945

CA Approved

Catalytic Converter

CA Approved

Catalytic Converter

CA Approved

Catalytic Converter

Exhaust Manifold with Intergrated

CA Approved
Catalytic Converter

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Universal, Direct-Fit, High-Flow, Manifold Catalytic Converters

Should I purchase a Universal or Direct Fit Catalytic Converter?
Generally universal converters are designed to be installed by a professional installer as they typically require some welding. Direct Fits are designed to be bolt on units. In either case the Emission compliance of the converters will meet or exceed Fed or CARB standards. Let an FMS professional locate the correct catalytic converter for your car, truck, or RV.

How do I know that the catalytic converter I purchase is (CARB) California Air Resource Board approved?
You can check with CARB on the approval for your car or truck by contacting the Helpline at 1-800-242-4450 or contacting FMS for a quote or clicking this link to select your search
What is the Warranty on a Replacement Catalytic Converter?
Federal EPA regulates a 2 year or 25,000 mile guarantee
California CARB regulates a 5 year or 50,000 mile guarantee
Factory replacement converters from the dealer only have to be warrantied for 1 year or 12,000 miles but most cars have a 8 year 80,000 mile warranty on the OE converter the vehicle came with.

My car has a PO420! Does that mean my converter is bad?
NO. The P0420 code, by definition reads “bank one Catalyst Efficiency low”.  A vehicle displaying this code is indicating that something is causing the converter to operate out of specification. Further diagnostics and/or inspection are required before condemning any parts as “bad” or defective. FMS can perform a Catalytic Converter Pre-Test, the inspection is free with the purchase of needed componants to correct the issue. Please make an appointment to drop the vehicle off for the complete inspection.

Catalytic Converters are emission control devices that are designed to last the life of the vehicle and do not normally require replacement without cause. A check engine light for catalytic efficiency does not by itself condem a catalytic converter, you could have other parts that have failed and do not neccessarily require a catalytic converter replacement, as per example an oxygen sensor not functioning correctly.  Your vehicle should be diagosed properly before a catalytic converter is to be replaced. If you would like to schedule an appointment for a complete diagnosis click here.

How can I determine my cars emissions certification levels?
All vehicles will come with a VECI (Vehicle Emission Control Information) label located in the engine compartment.

Can I use a catalytic converter cleaner on my car?
Yes, we suggest Cataclean by Mr Gasket. Cataclean contains solvents that can break down deposits formed by oxidation and polymerization of hydrocarbon in fuel delivery systems. Cataclean also includes acetone which is known to improve the efficiency of fuel combustion. Acetone has been used in race cars to enhance octane rating and make fuel burn more evenly and completely. When Cataclean combusts, carboxylic acids, aldehydes and active peroxy compounds are formed. These compounds in the exhaust vapors work to clean the surfaces inside the converter. The result is the removal of deposits from the surface of the core, which increases the catalyst’s ability to remove harmful exhaust emissions such as, carbon monoxide & nitrogen oxides.

What is a High Flow catalytic converter?
Most high flow catalytic converters flow higher than OE in flow capacity. The 400 CPI cell density of most high flow catalytic converters will out flow an OE for the same application while providing the necessary functionality.

What is a Oxygen Sensor?
The Oxygen Sensor monitors the amount of residual oxygen in the exhaust. Before being released into the atmosphere, exhaust gases pass through a catalyst where toxic substances in the gases are purified. In order to increase the efficiency of the catalytic converter, the combustion of injected fuel and inhaled atmospheric oxygen must be precisely controlled at the right ratio. The Engine ECU (computer) uses information provided by the oxygen sensor to detect the difference between the actual air-fuel ratio and the ideal air-fuel ratio to adjust the amount of fuel injection.

When should the Oxygen Sensor be replaced?
Oxygen sensors are not among the maintenance items that need to be replaced regularly, such as oil and air filters, so they typically are replaced only when they fail. Oxygen sensors are a critical component of the fuel and emissions systems because they monitor the amount of oxygen in the exhaust and transmit that information to the engine computer, which adjusts the air-to-fuel ratio accordingly. If an oxygen sensor fails, the engine computer won't be able to correctly set the air-fuel ratio, which could result in lower fuel economy, higher emissions and damage to other components, such as an overheated catalytic converter. No vehicle that we're aware of has a warning light that signals when an oxygen sensor has failed, so you have to rely on other vital signs to alert you when you have a bad oxygen sensor that you will need to replace, such as the check-engine light on the dashboard illuminating and increased fuel usage. Signs you need an Oxygen Sensor.


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