The AutoShack EM775001 Exhaust Manifold Converter is not certified for sale in California, Colorado, New York, or Maine. While it is EPA OBDII Approved for federal use, it does not come with a CARB (California Air Resources Board) EO number, which means it cannot be legally sold or installed in those specific states.
The EM775001 Catalytic Converter is a metal component that replaces the factory exhaust manifold to reduce tailpipe emissions while maintaining engine flow. We selected this unit for our comparison because it meets OEM specifications and holds an ISO / IATF 16949 certification. For an exhaust manifold converter buyer, confirming these specific state restrictions is vital because the substrate chemistry must meet local legal standards to pass emissions testing. This unit is designed as a direct installation onto existing exhaust systems for 2007-2012 Chevrolet Colorado and GMC Canyon 2.9L models, including a 4-bolt connection and a gasket. Because the data does not specify the internal cell count or a required break-in period, you should verify if the substrate matches the original equipment’s density to ensure the vehicle does not trigger a Check Engine Light (CEL) due to flow changes.
What to Check Before Buying the EM775001 Catalytic Converter
Before purchasing this converter, verify these technical details to ensure it meets your specific vehicle’s requirements:
- Confirm your state’s specific requirements, as this unit lacks the CARB EO number required for California and other restricted states.
- Verify that the 12604220, 12607896, 674999, 674-999, or 16611 OE part numbers match your engine block casting exactly.
- Check with the manufacturer to see if the internal substrate material and cell count are identical to the OEM specifications to avoid emissions failures.
- Confirm if the unit requires specific heat shielding or if the included hardware provides sufficient protection against substrate melting.
- Consult the manufacturer’s support page to determine if a specific temperature cycle or break-in period is required to activate the catalyst.
Evaluating the EM775001 Against Other Options
The EM775001 Catalytic Converter serves as a standard replacement for owners of specific 2.9L trucks who need a direct-fit, OEM-specification part. If you require a high-flow ceramic substrate for significant performance gains, you may want to look at high-flow alternatives that offer different flow characteristics than this standard converter. Buyers seeking a “universal” fit or those located in California should prioritize units that explicitly list a CARB EO number, as those will offer broader legal compatibility than this specific model.
If you own a 4×4, view our top-rated jeep wrangler manifold converter options.
If you own a 2007-2012 Chevrolet Colorado or GMC Canyon and live in a state other than California, Colorado, New York, or Maine, the EM775001 is a suitable choice for maintaining factory-spec emissions and fitment.
AutoShack EM775001 Front Exhaust Manifold Catalytic Converter
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The other Exhaust Manifold Converter guides we have published
- Choosing the Best Exhaust Manifold Catalytic Converter for Nissan Altima
- The Exhaust Manifold Catalytic Converters That Work Best for Honda Civic
- Which Exhaust Manifold Catalytic Converter is Best for a Jeep Wrangler?
- Best Exhaust Manifold Catalytic Converters for Hyundai Santa Fe Sport
- Exhaust Manifold Catalytic Converters for Toyota Camry Compared