Best Catalytic Converter Tests In May 2025

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Are you looking for the Top 10 Best Catalytic Converter Tests? Well, just grab a cup of coffee and read on! We are huge fans of Best Catalytic Converter Tests and have done our comprehensive research here.

To help you in your search, we have completed this list of the Best Catalytic Converter Tests.

Top Rated Best Catalytic Converter Tests Of 2025

Rank	Product Name	Score
1	OXICAT - Oxygen Sensor & Catalytic Converter Cleaner Buy Now	9.7 Buy Now
2	CRC Guaranteed to Pass Emissions Test Formula Buy Now	9.5 Buy Now
3	ASE X1 Test Prep - Exhaust Systems Certification Study Guide & Practice Tests Buy Now	9.1 Buy Now
4	Muffler Replacement - In Home Buy Now	8.8 Buy Now
5	For Honda Polished Chrome Stainless Steel High Performance Pipe Buy Now	8.6 Buy Now
6	MOSTPLUS Exhaust Manifold w/Catalytic Converter Compatible Compatible for 02-06 Toyota Camry Solara L4 Buy Now	8.3 Buy Now
7	Delkevic Aftermarket Slip On compatible with Honda NC750 & NC700 DS70 9" Carbon Buy Now	8.1 Buy Now
8	DNA Motoring HFCB5 Stainless Steel Exhaust Performance Pipe Buy Now	7.8 Buy Now
9	Catalytic Converter compatible with 2003-2006 Nissan 350Z | 2003-2007 Infiniti G35 RWD | Buy Now	7.5 Buy Now
10	Catalytic Converter Combo compatible with 2003-2006 Infiniti G35 | 2006-2008 Infiniti M35 | Buy Now	7.2 Buy Now

1. OXICAT - Oxygen Sensor & Catalytic Converter Cleaner

• Proven safe and effective by the pros, now available in north america. tuv certified, made in germany
• Safe and effective for all petrol (gasoline)and diesel vehicles
• Oxicat is activated when the catalytic converter reaches its required working temperature.
• Engineered to clean the entire exhaust system with regular use.

2. CRC Guaranteed to Pass Emissions Test Formula

• Works with all gasoline and ethanol blended fuels.
• Powerful detergent additives super-clean the entire fuel system
• Reduces emissions and improves performance in one tank full
• Maximum allowable cleaning chemistry for superior results.
• Use every 3,000 miles to improve fuel economy, acceleration and reduce emissions

3. ASE X1 Test Prep - Exhaust Systems Certification Study Guide & Practice Tests

4. Muffler Replacement - In Home

• Removing existing muffler from car
• Rusty mounting hardware may need to be replaced (not included in price)
• Clamping muffler to exhaust system with existing mounting hardware
• Customer must confirm compatibility between exhaust system and muffler to be installed
• Larger or more complex projects may result in an updated price estimate from providers
• Installation of one customer-provided muffler

5. For Honda Polished Chrome Stainless Steel High Performance Pipe

• Professional installer is highly recommended no instruction included
• Tig welded, cnc machined flange and mandrel-bent piping / o2 sensor bung insertion and metal gasket included
• Dyno proven increases low end torque and horse powers, instantly gains up to 10 - 15 hp. / tq
• Inlet size: 2. 25" / outlet size: 2. 25"
• Increases high flow air rate and maximizes performance

6. MOSTPLUS Exhaust Manifold w/Catalytic Converter Compatible Compatible for 02-06 Toyota Camry Solara

• Please check your car information before purchase.
• No welding, adjustments or any modifications to your system
• Oem part number: 25051-0h010, 250510h010, 674-811, 327-59240, 327-59381
• Compatible with 2002 2003 2004 2005 2006 toyota camry exhaust manifold with catalytic converter assembly for l4 2.4l, compatible with 2002-06 toyota solara exhaust manifold with catalytic converter assembly for l4 2.4l
• Note: epa approvedd not for ca & ny not legal for use on vehicles required to meet california emission standards

7. Delkevic Aftermarket Slip On compatible with Honda NC750 & NC700 DS70 9" Carbon

• Nc700 (2012-2017) & nc750 (2018-2019)
• Delkevic ds70 9" carbon fiber oval mufflers are made from a pre-formed carbon fiber composite sleeve and 304 stainless steel. this muffler is loud and aggressive with or without the baffles installed.
• Delkevic mufflers are handcrafted from the finest quality materials to enhance your motorcycle in both performance and looks.
• No rejetting or remapping is required after fitment on a stock bike however we always recommend a dyno test. if the motorcycle has other modificaitons to the intake or exhaust system some tuning may be required.
• This set includes all necessary hardware to mount the muffler onto the engine.

8. DNA Motoring HFCB5 Stainless Steel Exhaust Performance Pipe

• Dyno proven increases low end torque and horse powers, instant gain up to 10 - 15 hp. / tq.
• Tig welded cnc machine flange for resistance against pressure and corrosion
• O2 sensor bung insertion and metal gasket included
• Inlet: 2. 5" / outlet: 3" / piping diameter: 3"
• Increase high flow air and maximize performance

9. Catalytic Converter compatible with 2003-2006 Nissan 350Z | 2003-2007 Infiniti G35 RWD |

• Under federal law: catalytic converter may not be removed and replaced with "converter replacement pipes" by any person other than the actual certified installer, otherwise you will be subject to high fines by the us federal law. the 1990 clean air act. (amendments) goes even further by prohibiting private individuals from installing "converter replacement pipes" on the...
• Non-carb compliant: we do not ship to california & new york. not legal for use in california & new york, usa. this product will not pass the california or new york emission test.
• Aftermarket catalytic converters: kindly note, these products are aftermarket products, therefore, they will not appear as the original stock oem parts.
• Po420/po430 code/check engine: there is no guarantee that replacing the converter will keep a fault code/engine light from coming back. if an engine performance issues exist, and it has not been repaired, the po420/po430 fault code may reoccur.
• Vehicle compatibility: to ensure product accuracy you must use our compatibility feature on top left corner of this page, to determine whether this part is compatible with your vehicle.

10. Catalytic Converter Combo compatible with 2003-2006 Infiniti G35 | 2006-2008 Infiniti M35 |

• Aftermarket catalytic converters: kindly note, these products are aftermarket products, therefore, they will not appear as the original stock oem parts.
• Non-carb compliant: we do not ship to california & new york. not legal for use in california & new york, usa. this product will not pass the california or new york emission test.
• Under federal law: catalytic converter may not be removed and replaced with "converter replacement pipes" by any person other than the actual certified installer, otherwise you will be subject to high fines by the us federal law. the 1990 clean air act. (amendments) goes even further by prohibiting private individuals from installing "converter replacement pipes" on the...
• Po420/po430 code/check engine: there is no guarantee that replacing the converter will keep a fault code/engine light from coming back. if an engine performance issues exist, and it has not been repaired, the po420/po430 fault code may reoccur.
• Vehicle compativehicle compatibility: to ensure product accuracy you must use our compatibility feature on top left corner of this page, to determine whether this part is compatible with your vehicle.ehicle.