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20 Best 2003 Chevy Impala Catalytic Converter of 2023 – Romance University

After hours researching and comparing all models on the market, Romance University finds out the Best 2003 Chevy Impala Catalytic Converter of 2023. Check our ranking below.

2,816 Reviews Scanned

Rank No. #1

TED Direct-Fit Catalytic Converter Fits: 97-05 BUICK CENTURY/CHEVY IMPALA/MONTE CARLO/PONTIAC GRANDPRIX 3.1/3.4L

Flange to flange, direct fit design bolts to existing exhaust
5 Year/50 000 KM Warranty--Check Engine Light OFF + Emission PASS Guarantee!
Gaskets & Hardware Included Free of Charge
Not Legal for Use in California (Non C.A.R.B. Compliant)
Legal in NY State for vehicles with FEDERAL EMISSIONS

Rank No. #2

TOPAZ 2Pcs 2.5" Universal High Flow Catalytic Converter, Stainless Steel Catalytic Converter 2.5 inch Inlet/Outlet Diameter, 99306HM, 400 Cell w/ O2 Port (EPA Approved)

?MATERIALS?: Our high Flow Catalytic Converter is Made from Stainless steel and Ceramic Substrate , to provide more oxygen for an increase in power and performance, fully tested under the extreme conditions for heat resistance and service life.
?Compatibility?Universal for vehicles with 2.5 inches outer diameter exhaust pipe. Please check product description page below to make sure this item fits your vehicle first.
?Easy installing? The complete set high flow converter replaced on the vehicle of left/ right/ front/ rear part. Easy installing. Cutting and Welding may required, professional installation is highly recommended.
?EPA CERTIFIED?For use on pre-OBDII vehicles, not legal for use on vehicles required to meet California emission standards. NOT SHIP TO CA AND NY.
?WARRANTY?1 Year Warranty for any manufacturer defect.

SaleRank No. #3

Walker Exhaust Ultra EPA 54627 Direct Fit Catalytic Converter

EPA COMPLIANT -- For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA, CO & NY. Legal in 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

SaleRank No. #4

Walker Exhaust Ultra EPA 93253 Universal Catalytic Converter 2.5" Inlet (Inside) 2.5" Outlet (Inside)

EPA COMPLIANT -- For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA, CO & NY. Legal in ME on EPA Federal Emission Equipped Vehicles only. Consult your state's aftermarket converter regulations for details.
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
DURABLE -- Features stainless-steel body with aluminized pipe and heat shields for durability
FLEXIBLE SOLUTION -- Customizable design features expandable bushings for easy fitment and may require specialized fabrication and/or welding for installation
OE-STYLE DESIGN -- Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter

SaleRank No. #5

MagnaFlow 51206 OEM Grade Universal Catalytic Converter, 2.5" Inlet/Outlet (EPA Compliant)

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

Rank No. #6

Catalytic Converters 2.5" Inlet/Outlet Universal 15" Overall Length

Product Spec - Standard 2.5" inside diameter inlet/outlet, 15" overall length
Easy Installation
Features heavy-duty stainless steel construction
Easy Installation - Perfectly matched with the original vehicle
Package Includes: 1 x Universal

SaleRank No. #7

Dorman 57012 Front Catalytic Converter Exhaust Muffler/Resonator Hanger Compatible with Select Models

Direct replacement - this exhaust system hanger installs exactly as the original part
Easy installation - no special tools required to install this exhaust hanger
Durable materials - quality materials for a long service life
Quality tested - has undergone testing to ensure proper fit
Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool

Rank No. #8

MOTOOS 2.5" Universal Catalytic Converters Compatible with 02 03 04 05 06 07 08 09 S8 Buick Chevrolet Cadillac E-150 E-150 Club Wagon GMC Grand Cherokee Commander Pontiac

Fitment: Compatible with 2002 2003 S8 Base Sedan 4Door 4.2L V8; more fitment detail,please kindly check Amazon Vehicle fitment garage to make sure our item can fit for your car,thanks.
Inlet Size: 2.5"; Outlet Size: 2.5 inches; Certification: EPA; Placement on Vehicle: Left, Right, Front, Rear; Connection Type: Weld-on.
Material: Made of high quality aluminized steel material,sturdy,durable and high teperature resistant.
DESIGN: HIGH precious metal load and high technology washcoat for premium performance.Stainless steel construction,internal substrate material and precious metal loading have been carefully engineered for maximum efficiency.
Attention: Not legal for sale or use in the State of California; Not legal for sale or use in New York.

SaleRank No. #9

AP Exhaust 608416 Catalytic Converter

Part number: 608416
Package Weight: 9.999 pounds
Country of origin : China
Package Dimensions : 32.05" L x 11.72" W x 7.47" H

SaleRank No. #10

MagnaFlow Catalytic Converter 99206HM: 2.25"/2.5" Inlet/Outlet, HM Grade, Universal Fit (EPA Compliant)

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.
HEAVY METAL GRADE - Built to HM Grade standards, meaning that it contains extra catalysts to further improve the conversion of unwanted emissions.
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.

SaleRank No. #11

Walker Exhaust Ultra EPA 54626 Direct Fit Catalytic Converter

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

SaleRank No. #12

PHILTOP Catalytic Converter Stainless Steel Shell Fits 3" Universal Catalyst Catalyst Convertor (EPA Complaint)

Widely Compatible: PHILTOP Catalytic Converter replacement for 3" Universal Catalyst. Please confirm the match in "confirmed it" to ensure that the parts are appropriate for your vehicle application.
Features: CeO2 rare earth stabilizer metal is uniformly applied to the surface of ceramic hollow liners. The service life has been entirely extended and the heat resistance has been enhanced after extensive testing under harsh conditions. #OE Part Number#: 410300
Environmental criteria: This catalytic converter complies with EPA and OBD2 regulations in order to fix the P0528 engine code. This catalytic converter can fix the issue and the noise in addition to cleaning the exhaust.
Quality: This catalytic converter is produced by an ISO-certified company and contains a rust-resistant stainless steel tube body. The metal shell completely encloses the ceramic carrier, whose strong temperature resistance considerably boosts flow rate and surface area and boosts catalytic efficiency. improves clean air performance and returns the vehicle's silence.
Notification: The catalytic converters are in compliance with OBD III standards but not CARB specifications. With the exception of California and New York, they are allowed in the majority of states, however they cannot be used in cars that comply with CA emission requirements.

Rank No. #13

GM Genuine Parts 10328740 Catalytic Converter Gasket

Helps provide a tight seal for your vehicle's catalytic converter
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

Rank No. #14

MagnaFlow 99304HM Universal Catalytic Converter (Non CARB Compliant)

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.

Rank No. #15

12PCS Fluorescent Skull Car Tire Valve Stem Caps, ABS Corrosion Resistant Wheel Valve Cover, Luminous Illuminated Cap Glow in The Dark, Auto Decor Accessories for Motorcycles Bicycles (Green/White)

【Glow in the Dark】: The fluorescent car tire valve cover is made of luminous ABS material with a skull pattern on it, which absorbs light sources during the day and can produce amazing results at night or in dark environments. A beautiful aperture is formed when the tires move, making your car, motorcycle or bike looks cute and charming.
【Protect Your Air Valves】: The tire valves have a leak-proof rubber design for a strong seal, which will not leak even during long driving hours, it protects the tire valves from external dirt, and also prevents it from corrosion due to contact with rain and snow. If you have frequent problems with your tires, then you definitely need this product.
【Steady Installation】: Each set has 12 tire valve caps designed with swivel threads for easy installation and removal. You can easily tighten it by hand and do not need any tools at all. It can be firmly attached to the tire and will not fall off easily while driving. It can extend tire life and give your car a unique look. It is small and lightweight, however, it brings unusual look to your vehicle.
【Wide Compatibility】: Measuring 0.5 x 0.6 inches, the universal size is suitable for most cars, SUVs, motorcycles, bicycles, etc. There are variety of colors for you to choose, the white skull is stylish and cool, and the 12 fluorescent tire valve caps are enough for your use and replacement needs. You can also share them with family, neighbors and your colleagues.
【Warmly Tips】: The light source is stored during the day and glows at night. This material achieves an automatic luminescence function by absorbing various visible light, absorbing light for a period of time during the day, and glowing in the dark at night. When you first use it, leave it in sunlight or other visible light sources for a few hours to make sure it glows properly.

Rank No. #16

Catalytic Converters Stainless Steel Direct Fit for 97-05 buick century/chevy impala/monte carlo 3.1/3.4l

✅【High Standard】：This catalytic converter meets is designed to meet or even exceed OE quality and performance standards.
✅【Fitment】：For 1997 1998 1999 2000 2001 2002 20003 2004 2005 buick century/chevy impala/monte carlo 3.1/3.4l
✅【Material】：The ceramic carrier completely fills the inside of the interior of metal shell. The ceramic carrier is honeycomb, hollow , and coated with Rare Earth Stablizers metals. The hollow carrier is to help the gas flow.
✅【Features】：The ceramic hollow interior is coated with CeO2Rare earth stablizers metals, the ratio is up to standard, after full testing under extreme conditions,the heat resistance has been greatly improved and the service life has been fully extended.
✅【High flow design】：High flow design retains maximum engine output and maximizes catalytic efficiency.To provide more oxygen to your engine for an increase in power and performance.

Rank No. #17

AOCISKA 2 Packs Exhaust Clamp,2.0” 2.25” 2.5” 3.0” Stainless Steel Joint Exhaust Pipe Muffler Clamp Band Butt Joint Band Clamp Sleeve Coupler,Used for Exhaust Pipe,Muffler,Elbow (2inch)

[High Quality] Stainless steel lap joint exhaust pipe clamp is made of high-quality 304 stainless steel and galvanized, which can resist water corrosion and rust.
[Various Specifications] Our 2.5-inch exhaust pipe clamp connects 2.5 "OD pipe to 2.5" OD pipe. In addition, we provide three different sizes to meet your needs. Please confirm the specification and size before purchasing.
[Easy to Install] The exhaust pipe clamp is designed without welding, which is fast, convenient and accurate. It allows flexible disassembly and repair, and can be reused.
[Unified Structure] These exhaust pipe clamps have a unified structure, which minimizes the complexity of the number of parts, and maximizes the material efficiency, thus reducing the weight.
[Features]The butt clamp is a simple and effective method to connect exhaust system components (such as pipes, mufflers and catalytic converters). The reaction block provides a 360 ° uniformly distributed tensile force to prevent pipe deformation and form a seal around the connected exhaust components.

Rank No. #18

Car Solar Power Simulated Dummy Alarm, Anti-Theft LED Flashing Security Light Fake Lamp, Automotive Warning Interior Safety Lights with USB Charger Port, Car Accessories for Most Cars (Blue/1PCS)

【Eco-Friendly Solar Power】: The car false alarm light is powered by the latest upgraded solar energy, which can be absorbed and saved in the battery. It can flicker all night long after enough sunlight shines during the day. Note: This LED will blink at night, not during the day. (If you want it to blink during the day, you can cover the other end with dark paper).
【With USB Charging Port】: This analog alarm light not only can be charged automatically with solar energy, but also has a USB charging port. When there is not enough light on rainy days, you can use the USB to charge. The LED will strobe slightly when charging, and stop strobing when fully charged.
【Anti-Theft】: This car simulator alarm light can scare off those with bad intentions and protect your property from potential thieves at night. Built-in light sensor, the microcomputer controller will automatically sense the intensity of light. There is a setting switch on the back, when you don't want it to blink you can turn the switch to OFF, when you want it to start working you can turn the switch to ON.
【Strong Adhesive on The Bottom】: It comes with strong double-sided tape on the bottom, so you can simply stick it anywhere you want to mount it. Note: Please make sure the surface is dry and clean before sticking, try not to stick on dirty or rough surface.
【Package Includes】: Included in the package is a dummy alarm light measuring 1.96 x 0.98 inches. We offer two specifications for you to choose from, red light and blue light. If you have any questions, please feel free to contact us, we will reply as soon as possible.

Rank No. #19

Zlirfy Exhaust Clamp Exhaust Pipe Clamp,2.0” 2.25” 2.5” 2.75” 3.0” 4.0” Butt Joint Stainless Steel Clamp Band,Universal Widening Clamp Butt Joint Exhaust Clamp,Fit for Exhaust Pipe (2.25inch)

[High Quality and Durability]The exhaust pipe clamp is made of high-quality stainless steel, which is rust proof, waterproof, durable, and corrosion-resistant. It can be reused and has a long service life.
[6 Specifications]Our 2.5 inch exhaust clamp connects a pipe with an outer diameter of 2.5 "to a pipe with an outer diameter of 2.5". We have a total of 6 different sizes of exhaust clamps for you to choose from and purchase. Please confirm the specifications and dimensions before purchasing.
[Design Features] This stainless steel clamp band clamp is designed with a 360 degree full clamping zone, and the clamping force is evenly distributed throughout the entire 360 degree range to prevent leakage and control pipeline deformation.
[Easy to Install] This exhaust band clamp sleeve comes with fastening bolts. You only need to tighten or lose the bolts to connect or release. No welding required, easy to use.
[Application] Sealed exhaust clamps are maintenance components for silencers. Narrow band clamps can be used for catalytic converters, exhaust nozzles, exhaust manifolds, exhaust resonators, exhaust hoses, and exhaust muffler maintenance projects.

SaleRank No. #20

YAKEFLY Exhaust Clamp,Exhaust Pipe Connector,Stainless Steel Band Coupler Sleeve Lap Joint Band Clamp,Suitable for Exhaust System,Muffler,pipes,Catalytic Converters (3.0 inch)

[Specification] The stainless steel "butt exhaust clamps, connecting 3.0" outer diameter pipes and 3.0 "inner diameter pipes, with a width of 2.94 inches/74.82 millimeters.
[High Quality Stainless Steel]The exhaust clamp is made of high-quality 304 stainless steel, which is not prone to rust and corrosion, and has excellent durability and sealing performance.
[Non Welded Design] The exhaust clamp adopts a non welded design, making the installation of the exhaust clamp fast, convenient, and accurate. When tightening, it will not damage the exhaust end, and the curved surface can prevent exhaust gas and noise leakage. The exhaust clamp is detachable and reusable.
[Full Clamping Area] The exhaust band clamp is designed as a 360 degree fully clamped area, which can generate overall sealing force without distorting the exhaust pipe, exhaust muffler end, and exhaust pipe in the exhaust system connection.
[Application] Lap clamps are a simple and effective method for connecting exhaust system components, such as pipes, mufflers, catalytic converters, etc.

Last update on 2023-08-20 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

How Do You Buy The Best 2003 Chevy Impala Catalytic Converter?

Do you get stressed out thinking about shopping for a great 2003 Chevy Impala Catalytic Converter? Do doubts keep creeping into your mind? We understand, because we’ve already gone through the whole process of researching 2003 Chevy Impala Catalytic Converter, which is why we have assembled a comprehensive list of the greatest 2003 Chevy Impala Catalytic Converter available in the current market. We’ve also come up with a list of questions that you probably have yourself.

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If you think that anything we present here regarding 2003 Chevy Impala Catalytic Converter is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly! We’re here for you all the time. Contact us here. Or You can read more about us to see our vision.

FAQ:

Q: Where is the catalytic converter on a Chevy Impala?

A: The exact location of the catalytic converter is going to depend on the model year and engine size of your Chevy Impala. But, they are not that difficult to locate. The catalytic converter itself is a part of the exhaust system. Tracing it, you’ll find it somewhere between the tail pipe and intake manifolds.

Q: How does a catalytic converter work in a car?

A: The catalytic converter uses a catalyst to burn off residual fuel vapor and turn it them into: Catalytic converter’s have been common in all domestic automobiles for nearly 40 years. They have gotten better at what they do from an exhaust flow perspective, and an exhaust cleansing perspective.

Q: What are the symptoms of a bad catalytic converter?

A: Most of the symptoms of a bad catalytic converter have to do with the lack of exhaust flow through the Cat. Once it gets so clogged, your Impala will be barely drivable.

Q: How much does it cost to replace catalytic converter?

A: They are almost always more than $100, and can cost several hundred dollars for a large on that sits behind a V8. Since it often requires welding to replace the catalytic converter, it’ll often mean a trip to the exhaust shop. Later model vehicles can cost over $1000, when it’s all said and done.