Best Royal Exhaust Automotive Replacement Catalytic Converters in 2026

Daisy
Last Updated: Jul 19, 2026

At a Glance: Our Top Picks for Royal Exhaust Automotive Replacement Catalytic Converters

MagnaFlow Universal Catalytic Converter OEM Grade Federal/EPA Compliant 51355 - Stainless Steel 2.25in Inlet/Outlet Diameter, 15in Overall Length, Midbed O2 Sensor - OEM Replacement
#TOP1
Magnaflow Universal Catalytic Converter Oem Grade Federal/Epa Compliant
9.1
PM SCORE
MagnaFlow Universal Catalytic Converter HM Grade Federal/EPA Compliant 99204HM - Stainless Steel 2in Inlet/Outlet Diameter, 13in Overall Length, No O2 Sensor - HM Replacement
#TOP2
Magnaflow Universal Catalytic Converter Hm Grade Federal/Epa Compliant
9.1
PM SCORE
MagnaFlow Universal Catalytic Converter California Grade CARB Compliant 447206
#TOP3
Magnaflow Universal Catalytic Converter California Grade Carb Compliant
9.0
PM SCORE

* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.

Summary of the Best Royal Exhaust Automotive Replacement Catalytic Converters of 2026

Magnaflow Universal Catalytic Converter Oem Grade Federal/Epa Compliant 51355 - Stainless Steel 2.25In Inlet/Outlet Diameter, 15In Overall Length, Midbed O2 Sensor - Oem Replacement

MAGNAFLOW EXHAUST PRODUCTS
51355
16.00 X 5.00 X 4.75 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Performance Guarantee 9.65

Features

EPA OBDII COMPLIANT - This catalytic converter is designed to meet or exceed Federal EPA (Environmental Protection Agency) OBDII emissions requirements. Item is NOT shippable to CA or CO AND any order will need to be CANCELED if shipping address is located in either state

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 long-term reliability

STAINLESS-STEEL CONSTRUCTION - The utilization of highly corrosion resistant stainless-steel construction, free-flowing mandrel bent pipes and MagnaFlow’s cutting-edge CNC precision robotic manufacturing techniques ensure consistently perfect fitment, reliability, 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 - MagnaFlow recommends professional installation for the universal configuration of this catalytic converter as cutting, fabrication and/or welding may be required. While this MagnaFlow part is universal, confirm fitment details above in "Confirmed Fit" feature

Magnaflow Universal Catalytic Converter Hm Grade Federal/Epa Compliant 99204Hm - Stainless Steel 2In Inlet/Outlet Diameter, 13In Overall Length, No O2 Sensor - Hm Replacement

MAGNAFLOW EXHAUST PRODUCTS
99204HM
14.00 X 5.00 X 5.00 Inches
1.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
IPC-STORE✅ 9.83

Features

EPA OBDII COMPLIANT - This catalytic converter is designed to meet or exceed Federal EPA (Environmental Protection Agency) OBDII emissions requirements. Item is NOT shippable to CA or CO AND any order will need to be CANCELED if shipping address is located in either state

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 long-term reliability

STAINLESS-STEEL CONSTRUCTION - The utilization of highly corrosion resistant stainless-steel construction, free-flowing mandrel bent pipes and MagnaFlow’s cutting-edge CNC precision robotic manufacturing techniques ensure consistently perfect fitment, reliability, 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 - MagnaFlow recommends professional installation for the universal configuration of this catalytic converter as cutting, fabrication and/or welding may be required. While this MagnaFlow part is universal, confirm fitment details above in "Confirmed Fit" feature

Magnaflow Universal Catalytic Converter California Grade Carb Compliant 447206

MAGNAFLOW EXHAUST PRODUCTS
447206
14.00 X 6.63 X 4.50 Inches
4.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

CALIFORNIA/CARB COMPLIANT - Extensive testing and certification processes are followed to guarantee that 447206 meets emissions standards set by CARB (California Air Resources Board). This catalytic converter is also compliant in states adhering to these standards.

UNIVERSAL INSTALLATION - Universal catalytic converters allow you to place it in the exact location and orientation required for your vehicle. Professional installation is highly recommended.

CLAMSHELL DESIGN - Durable stainless-steel construction and integrated OEM-like O2 ports guarantee optimal catalytic converter performance and reliability. The clamshell design features a continuous seam weld that ensures superior thermal insulation.

CARB GRADE - Catalytic converter 447206 is designed to meet California emissions standards, as well of those of other CARB-regulated states.

5 YEAR / 50,000-MILE LIMITED WARRANTY - Worry-free ownership is made possible thanks to the 5 year/50,000-mile construction and emissions warranty included with this MagnaFlow catalytic converter

Magnaflow Exhaust Products 51205 Universal Converter, Large

MAGNAFLOW EXHAUST PRODUCTS
51205
13.00 X 4.25 X 2.25 Inches
4.50 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Gear4YouLLC 8.89

Features

Stainless steel construction

Federal emissions compliant design

Formulated for gas and diesel applications

Seam welded close to the converter body for a strong, tight bond

Made in U.S.A.

Installation Instruction:Professional installation is highly recommended. May require custom fabrication, cutting and / or welding along with specific automotive knowledge.

Magnaflow 51206 Oem Grade Universal Catalytic Converter, 2.5" Inlet/Outlet (Epa Compliant)

MAGNAFLOW EXHAUST PRODUCTS
51206
13.75 X 5.00 X 4.75 Inches
4.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
PLEXSUPPLY. 9.87

Features

EPA 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, Colorado, New York, Maine.

UNIVERSAL INSTALLATION - Universal catalytic converters allow you to place it in the exact location and orientation required for your vehicle. Professional installation is highly recommended.

STAINLESS STEEL CONSTRUCTION - Durable stainless-steel construction and integrated OEM-like O2 ports guarantee optimal catalytic converter performance and reliability. The clamshell design features a continuous seam weld that ensures superior thermal insulation.

OEM GRADE - Built to OEM Grade standards, matching the performance and quality of your vehicle’s original catalytic converter.

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

Seam welded body

1/2 Lap joint at neck and body

Stainless steel construction

EPA Legal

49 State

Magnaflow Universal Catalytic Converter 51006 - Oem Grade, Epa Compliant

MAGNAFLOW EXHAUST PRODUCTS
51006
17.75 X 7.00 X 4.50 inches
0.44 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

FEDERAL/EPA COMPLIANT - Extensive testing and certification processes are followed to guarantee that 51006 meets emissions standards set by the Federal EPA.

UNIVERSAL INSTALLATION - Universal catalytic converters allow you to place it in the exact location and orientation required for your vehicle. Professional installation is highly recommended.

CLAMSHELL DESIGN - Durable stainless-steel construction and integrated OEM-like O2 ports guarantee optimal catalytic converter performance and reliability. The clamshell design features a continuous seam weld that ensures superior thermal insulation.

OEM GRADE - 51006 is built to OEM Grade standards, matching the performance and quality of your vehicle’s original catalytic converter.

5 YEAR / 50,000-MILE LIMITED WARRANTY - Worry-free ownership is made possible thanks to the 5 year/50,000-mile construction and emissions warranty included with this MagnaFlow catalytic converter

Magnaflow Universal Catalytic Converter California Grade Carb Compliant 408034 - Stainless Steel 2In Inlet/Outlet Diameter, 15In Overall Length, Post Converter O2 Sensor - Ca Legal Replacement

MAGNAFLOW EXHAUST PRODUCTS
408034
0.00 X 0.00 X 0.00 Inches
4.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Parts Synergy, Inc. 9.15

Features

CALIFORNIA OBDII COMPLIANT - MagnaFlow has put this catalytic converter through extensive testing in order to make sure that it meets or exceeds CARB (California Air Resources Board) OBDII requirements for legal use in California and CARB restricted states (Colorado) for certified vehicles

KEEP THE CHECK ENGINE LIGHT OFF - This MagnaFlow 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 long-term reliability

PREMIUM STAINLESS-STEEL CONSTRUCTION - The utilization of highly corrosion resistant stainless-steel construction, free-flowing mandrel bent pipes and MagnaFlow’s cutting-edge CNC precision robotic manufacturing techniques ensure consistently perfect fitment, reliability, 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 emissions warranty included with this MagnaFlow catalytic converter

UNIVERSAL FIT - MagnaFlow recommends professional installation for the universal configuration of this catalytic converter as cutting, fabrication and/or welding may be required. While this MagnaFlow part is universal, confirm fitment details above in "Confirmed Fit" feature

Magnaflow 93224 Large Stainless Steel Direct Fit Catalytic Converter

MAGNAFLOW EXHAUST PRODUCTS
93224
29.00 X 14.00 X 6.00 Inches
5.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
SG MARKETPLACE 9.59

Features

Federal; 49 State Converter

EPA Legal

CatSMART Converter Technology

Mandrel bent tubing

Stainless steel construction

Magnaflow Universal Catalytic Converter California Grade Carb Compliant 334106 - Stainless Steel 2.5In Inlet/Outlet Diameter, 13In Overall Length, No O2 Sensor - Ca Legal Replacement

MAGNAFLOW EXHAUST PRODUCTS
334106
14.00 X 6.63 X 4.50 Inches
4.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Lifeline Brands 9.85

Features

CALIFORNIA PRE-OBDII COMPLIANT - MagnaFlow has put this catalytic converter through extensive testing in order to make sure that it meets or exceeds CARB (California Air Resources Board) Pre-OBDII requirements for legal use in California and CARB restricted states (Colorado) for certified vehicles

UPGRADED DESIGN - MagnaFlow’s latest manufacturing technologies make it possible for a catalytic converter such as this one to benefit from improved exhaust flow characteristics and a modern construction design when compared to the part it’s replacing

PREMIUM STAINLESS-STEEL CONSTRUCTION - The utilization of highly corrosion resistant stainless-steel construction, free-flowing mandrel bent pipes and MagnaFlow’s cutting-edge CNC precision robotic manufacturing techniques ensure consistently perfect fitment, reliability, 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 emissions warranty included with this MagnaFlow catalytic converter

UNIVERSAL FIT - MagnaFlow recommends professional installation for the universal configuration of this catalytic converter as cutting, fabrication and/or welding may be required. While this MagnaFlow part is universal, confirm fitment details above in "Confirmed Fit" feature

Magnaflow California Universal Catalytic Converter 445300: 3" Inlet/Outlet, Carb Compliant

MAGNAFLOW EXHAUST PRODUCTS
445300
32.00 X 8.00 X 8.00 Inches
1.20 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

CARB COMPLIANT - Extensive testing and certification processes are followed to guarantee that 445300 meets emissions standards set by CARB (California Air Resources Board). This California Grade catalytic converter is compliant in states adhering to these standards: Legal for sale in California, Colorado, New York, Maine, and any other states requiring CARB-compliant replacement converters. Consult your state’s aftermarket converter regulations.

UNIVERSAL INSTALLATION - Universal catalytic converters allow you to place it in the exact location and orientation required for your vehicle. Professional installation is highly recommended.

CLAMSHELL DESIGN - Durable stainless-steel construction and integrated OEM-like O2 ports guarantee optimal catalytic converter performance and reliability. The clamshell design features a continuous seam weld that ensures superior thermal insulation.

CARB GRADE - Catalytic converter 445300 is designed to meet California emissions standards, as well of those of other CARB-regulated states.

5 YEAR / 50,000-MILE LIMITED WARRANTY - Worry-free ownership is made possible thanks to the 5 year/50,000-mile construction and emissions warranty included with this MagnaFlow catalytic converter.

Magnaflow 23622 Direct Fit Catalytic Converter (Non Carb Compliant)

MAGNAFLOW EXHAUST PRODUCTS
23622
17.00 X 5.00 X 5.00 Inches
5.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
SG MARKETPLACE 9.59

Features

Stainless steel construction

Federal emissions compliant design

Formulated for gas and diesel applications

Seam welded close to the converter body for a strong, tight bond

Made in U.S.A.

Magnaflow Universal Catalytic Converter California Grade Carb Compliant 334104

MAGNAFLOW EXHAUST PRODUCTS
334104
0.00 X 0.00 X 0.00 Inches
4.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Juiced Accessories 9.76

Features

CALIFORNIA/CARB COMPLIANT - Extensive testing and certification processes are followed to guarantee that 334104 meets emissions standards set by CARB (California Air Resources Board). This catalytic converter is also compliant in states adhering to these standards.

UNIVERSAL INSTALLATION - Universal catalytic converters allow you to place it in the exact location and orientation required for your vehicle. Professional installation is highly recommended.

CLAMSHELL DESIGN - Durable stainless-steel construction and integrated OEM-like O2 ports guarantee optimal catalytic converter performance and reliability. The clamshell design features a continuous seam weld that ensures superior thermal insulation.

CARB GRADE - Catalytic converter 334104 is designed to meet California emissions standards, as well of those of other CARB-regulated states.

5 YEAR / 50,000-MILE LIMITED WARRANTY - Worry-free ownership is made possible thanks to the 5 year/50,000-mile construction and emissions warranty included with this MagnaFlow catalytic converter

Magnaflow Direct-Fit Catalytic Converter Oem Grade Federal/Epa Compliant 51578 - Stainless Steel 2.5In Main Piping, 45In Overall Length, Pre-And-Post Converter O2 Sensor - Oem Domestic Replacement

MAGNAFLOW EXHAUST PRODUCTS
51578
0.00 X 0.00 X 0.00 Inches
5.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
SG MARKETPLACE 9.59

Features

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. This direct-fit catalytic converter is designed to fit the 2009-2013 Chevrolet Silverado 1500, 2009-2013 GMC Sierra 1500, and additional vehicles

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, free-flowing mandrel bent pipes 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

DIRECT-FIT - The direct-fit configuration of this catalytic converter allows it to function as a bolt-on replacement, enabling hassle-free installation. MagnaFlow utilizes state-of-the-art 3D scanning technology during the research and development process to ensure that this new converter will fit and function exactly like the original equipment. Necessary installation hardware and/or gaskets are included

Top 10 automotive replacement catalytic converters Brands on Amazon

Here is the list of top-rated brands that were evaluated by PM.

Brand Count
Magnaflow Exhaust Products 13

Top 10 automotive replacement catalytic converters Brands Pie Chart


We've carried out a comprehensive analysis of 630 reviews on automotive replacement catalytic converters, using our selection criteria to identify the best options in the categories. Our findings reveal that most customers typically select automotive replacement catalytic converters priced around $489.16, with top brands including and

Our team of expert editors reviewed these high-quality items and handpicked the top 13 automotive replacement catalytic converters for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the categories category. These include and .

We are dedicated to assisting our users in finding the right converters Products based on their needs, saving them considerable time when choosing which automotive replacement catalytic converters to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.