Best Catalytic Converter For Emissions

If you are looking for the best catalytic converter for emissions of top quality, read our detailed reviews on them here before making the purchase decision.

In Hurry? Checkout Our Top Pick Of Best Catalytic Converter For Emissions.

Our Top Pick
MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99205HM

9.7/10 our score

Best Catalytic Converter For Emissions

Rank Product Name Score
1
MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99205HM

MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99205HM
9. 7
2
Cataclean 120007 Complete Engine, Fuel and Exhaust System Cleaner, 473 Milliliter

Cataclean 120007 Complete Engine, Fuel and Exhaust System Cleaner, 473 Milliliter
9. 5
3
MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51209

MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51209
9. 1
4
Walker 54809 Ultra EPA Certified Catalytic Converter

Walker 54809 Ultra EPA Certified Catalytic Converter
8. 8
5
Hi-Gear HG3270s EZ Emissions Pass and Catalytic Converter Cleaner - 15 fl. oz.

Hi-Gear HG3270s EZ Emissions Pass and Catalytic Converter Cleaner – 15 fl. oz.
8. 6
6
DURA LUBE Severe Catalytic and Exhaust Treatment Emissions Test Catalytic Cleaner 16 fl. oz, 1 Pack, HL-402409

DURA LUBE Severe Catalytic and Exhaust Treatment Emissions Test Catalytic Cleaner 16 fl. oz, 1 Pack, HL-402409
8. 2
7
Motorkote Catalytic and Exhaust Treatment Emissions Control Catalytic Cleaner, MK-10351, 16 fl. oz, 1 Pack, Emissions Test

Motorkote Catalytic and Exhaust Treatment Emissions Control Catalytic Cleaner, MK-10351, 16 fl. oz, 1 Pack, Emissions Test
8. 0
8
Front Catalytic Converter 2012-2018 Ford Focus Integrated with Manifold, PZEV Emissions

Front Catalytic Converter 2012-2018 Ford Focus Integrated with Manifold, PZEV Emissions
7 .7
9
2Pcs BoostUp Catalytic Converter Cleaner - Lower Emission Levels, Better Engine Performance, Safe & Effective for Vehicles, Protect Engine, Clean The Entire System (120ml) (2PCS)

2Pcs BoostUp Catalytic Converter Cleaner – Lower Emission Levels, Better Engine Performance, Safe & Effective for Vehicles, Protect Engine, Clean The Entire System (120ml) (2PCS)
7. 4
10
AutoShack EM64362 EPA Compliant Rear Catalytic Converter Exhaust Pipe Replacement for 2002 2003 2004 2005 2006 Nissan Altima 2.5L

AutoShack EM64362 EPA Compliant Rear Catalytic Converter Exhaust Pipe Replacement for 2002 2003 2004 2005 2006 Nissan Altima 2.5L
7. 2

1. MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99205HM

MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99205HM

9.7/10 our score

  • EPA OBDII COMPLIANT: This catalytic converter is designed to meet or exceed Federal EPA (Environmental Protection Agency) OBDII emissions requirements in compliance with legal standards for federally registered vehicles. NOT for use in California or Colorado.
  • KEEP THE CHECK ENGINE LIGHT OFF: This MagnaFlow HM grade catalytic converter has been engineered to satisfy the vehicle computer control monitoring requirements for the specific applications listed. Such exacting standards keep the check engine light off while guaranteeing reliable long-term performance.
  • STAINLESS STEEL CONSTRUCTION: The utilization of highly corrosion resistant stainless-steel construction and MagnaFlow’s cutting-edge CNC precision robotic manufacturing techniques ensure consistently perfect fitment, reliable performance and superior longevity.
  • 5 YEAR / 50,000-MILE LIMITED WARRANTY: Worry-free ownership is made possible thanks to the 5 year/50,000-mile construction and 25,000-mile emissions warranty included with this MagnaFlow catalytic converter.
  • UNIVERSAL FIT: The universal configuration of this catalytic converter means that cutting, fabrication and/or welding may be required. MagnaFlow recommends professional installation.

2. Cataclean 120007 Complete Engine, Fuel and Exhaust System Cleaner, 473 Milliliter

Cataclean 120007 Complete Engine, Fuel and Exhaust System Cleaner, 473 Milliliter

9.5/10 our score

  • Using Cataclean can lower your total hydrocarbon emissions by up to 50 percent
  • Reduces carbon build-up in catalytic converter, oxygen sensors, fuel injectors and cylinder heads which results in improved fuel efficiency
  • Improves overall vehicle performance-including driveability issues such as power reduction, hesitation, rough idle, hard starts and lost fuel economy
  • Safe for gasoline, diesel, hybrid and flex-fuel vehicles, does not alter fuel
  • Not for use in 2-stroke or oil / gas mix engines

3. MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51209

MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51209

9.1/10 our score

  • EPA OBDII COMPLIANT: This catalytic converter is designed to meet or exceed Federal EPA (Environmental Protection Agency) OBDII emissions requirements in compliance with legal standards for federally registered vehicles with California or Federal EPA emissions systems. NOT for use in California or Colorado.
  • KEEP THE CHECK ENGINE LIGHT OFF: This MagnaFlow OEM grade catalytic converter has been engineered to satisfy the vehicle computer control monitoring requirements for the specific applications listed. Such exacting standards keep the check engine light off while guaranteeing reliable long-term performance.
  • STAINLESS STEEL CONSTRUCTION: The utilization of highly corrosion resistant stainless-steel construction and MagnaFlow’s cutting-edge CNC precision robotic manufacturing techniques ensure consistently perfect fitment, reliable performance and superior longevity.
  • 5 YEAR / 50,000-MILE LIMITED WARRANTY: Worry-free ownership is made possible thanks to the 5 year/50,000-mile construction and 25,000-mile emissions warranty included with this MagnaFlow catalytic converter.
  • UNIVERSAL FIT: The universal configuration of this catalytic converter means that cutting, fabrication and/or welding may be required. MagnaFlow recommends professional installation.

4. Walker 54809 Ultra EPA Certified Catalytic Converter

Walker 54809 Ultra EPA Certified Catalytic Converter

8.8/10 our score

  • EPA COMPLIANT — For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA & CO. Legal in NY & ME on EPA Federal Emission Equipped Vehicles only. Consult your state’s aftermarket converter regulations for details.
  • DIRECT-FIT DESIGN — Direct-fit bolt-on replacement solution with OE-style hangers, brackets, routings and heat shields for easy installation that doesn’t require specialized fabrication and/or welding
  • KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES — OE-style high-technology washcoat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
  • STRONG AND DURABLE — Features thick OE-style flanges, hangers and brackets for strength and durability
  • OE-STYLE DESIGN — Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter

5. Hi-Gear HG3270s EZ Emissions Pass and Catalytic Converter Cleaner – 15 fl. oz.

Hi-Gear HG3270s EZ Emissions Pass and Catalytic Converter Cleaner - 15 fl. oz.

8.6/10 our score

  • Cleans fuel system, injectors, combustion chamber, pistons and valves
  • Restores lost horsepower and increases fuel efficiency
  • Prevents rotten egg smell
  • Reduces toxic gases and CO2 emissions
  • Removes carbon deposits

6. DURA LUBE Severe Catalytic and Exhaust Treatment Emissions Test Catalytic Cleaner 16 fl. oz, 1 Pack, HL-402409

DURA LUBE Severe Catalytic and Exhaust Treatment Emissions Test Catalytic Cleaner 16 fl. oz, 1 Pack, HL-402409

8.2/10 our score

  • Use when warning light is activated
  • Use before or prior to replacing catalytic converter
  • Protects catalytic system from oil poisons
  • Reduces phosphorus and zinc retention levels at catalyst inlet
  • Lowers tail pipe emissions
  • Fit type: Universal Fit

7. Motorkote Catalytic and Exhaust Treatment Emissions Control Catalytic Cleaner, MK-10351, 16 fl. oz, 1 Pack, Emissions Test

Motorkote Catalytic and Exhaust Treatment Emissions Control Catalytic Cleaner, MK-10351, 16 fl. oz, 1 Pack, Emissions Test

8/10 our score

  • Use when warning light is activated
  • Use before or prior to replacing catalytic converter
  • Protects catalytic system from oil poisons
  • Reduces phosphorus and zinc retention levels at catalyst inlet
  • Helps clean oxygen ( O2 ) sensor(s), lowers tail pipe emissions, works great for P0420 Catalytic Converter Code

8. Front Catalytic Converter 2012-2018 Ford Focus Integrated with Manifold, PZEV Emissions

Front Catalytic Converter 2012-2018 Ford Focus Integrated with Manifold, PZEV Emissions

7.7/10 our score

  • Direct Replacement Catalytic Converter Compatible with 2012-2018 Ford Focus
  • Evan Fischer RF96030005 Features: Assembly, Stainless Steel Tube, Single (7-bolt fixed flange) Inlet, 2 Sensor Ports, 36 in. Overall Length, Single (2-bolt fixed flange) Outlet, Manifold Converter
  • 46-State Legal (Cannot ship to CA, CO, NY or ME)
  • Position: Front
  • A high quality, Direct Fit OE Replacement Catalytic Converter, with FREE 5-year or 50,000-mile Evan Fischer limited warranty coverage

9. 2Pcs BoostUp Catalytic Converter Cleaner – Lower Emission Levels, Better Engine Performance, Safe & Effective for Vehicles, Protect Engine, Clean The Entire System (120ml) (2PCS)

2Pcs BoostUp Catalytic Converter Cleaner - Lower Emission Levels, Better Engine Performance, Safe & Effective for Vehicles, Protect Engine, Clean The Entire System (120ml) (2PCS)

7.4/10 our score

10. AutoShack EM64362 EPA Compliant Rear Catalytic Converter Exhaust Pipe Replacement for 2002 2003 2004 2005 2006 Nissan Altima 2.5L

AutoShack EM64362 EPA Compliant Rear Catalytic Converter Exhaust Pipe Replacement for 2002 2003 2004 2005 2006 Nissan Altima 2.5L

7.2/10 our score

  • 100% brand new. Bolt-on connection, flange to flange for direct installation onto existing exhaust system. Gasket and hardware are included.
  • EPA OBDII Approved. OE / Interchange: 54360, 4295.
  • ISO / IATF 16949 Certified, made from premium quality materials to meet OEM specifications. Backed by a 6-month warranty.
  • Due to increased emissions standards, this item is not certified for sale in California, Colorado, New York and Maine. If your vehicle is registered in California, Colorado, New York or Maine DO NOT BUY this item.
  • Replacement for 2002 2003 2004 2005 2006 Nissan Altima 2.5L. Please use Amazon’s vehicle fitment tool (located at the top of the listing on desktop, below the images on mobile) to confirm that the part is correct for your vehicle application.