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20 Best 2003 Gmc Envoy Catalytic Converter Problems of 2023 – Romance University

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

2,042 Reviews Scanned

SaleRank No. #1
AutoShack EM65478 Catalytic Converter Exhaust Pipe Direct Fit Replacement for Chevrolet Trailblazer Isuzu Ascender Oldsmobile Bravada Buick Rainier 2002-2005 GMC Envoy 2005 Saab 9-7x (EPA Compliant)
  • Direct fit for installation onto existing exhaust system. 100% new
  • EPA Compliant. Interchange: 55476, 9171. Professional Installation is Highly Recommended
  • Made from premium quality materials to meet original specifications. Replacement for 2002-2005 GMC Envoy 2002-2005 Chevrolet Trailblazer 2002 2003 2004 Oldsmobile Bravada 2004-2005 Buick Rainier 2005 Saab 9-7x 4.2L 4WD AWD RWD
  • This product is not legal for sale or use in California, Colorado, New York and Maine due to state emissions regulations
  • 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
SaleRank No. #2
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. #3
Walker Exhaust Ultra EPA 55476 Direct Fit Catalytic Converter 3.75" Inlet (Inside)
  • 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
  • BUY WITH CONFIDENCE -- Backed by Walker's 25,000-mile/40,000-kilometer emissions and 5-year 50,000-mile/80,000-kilometer structural integrity warranty. Visit Walkerexhaust.com for details.
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
Rank No. #5
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.
SaleRank No. #6
Walker Exhaust CalCat Carb 83403 Universal Catalytic Converter 2.5" Inlet (Inside) 2.5" Outlet (Inside)
  • SUPERIOR TECHNOLOGY -- Optimal high technology washcoat formulated to deliver superior performance (as compared to EPA-compliant converters)
  • CONSISTENT PERFORMANCE -- Utilizes a precise OE-style coating process to apply catalyst material to the substrate, providing consistent performance for assured emissions compliance
  • 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
  • BUY WITH CONFIDENCE -- Backed by Walker's 50,000-mile/80,000-kilometer emissions and structural integrity warranty
SaleRank No. #7
Autel MS300 OBD2 Scanner Code Reader, Turn Off Check Engine Light, Read & Erase Fault Codes, Check Emission Monitor Status CAN Diagnostic Scan Tool
  • 【For Car DIYers And Beginners】This plug-and-play Autel scanner MS300 can pay for itself in the first use. It communicates with vehicles through standard 16-PIN OBD2 cable and it’s powered by vehicle directly (no battery needed). It capable of scanning vehicle Diagnostic Trouble Codes (DTCs) in seconds to pinpoint emission-related issues. The little guy should be a member of your toolbox, always in your car and ready to be taken out and used.
  • 【Read Codes & Clear Codes In Seconds】Getting diagnostic codes(DTCs) should be the start of all repairs if you don't want to be ripped off. You can use MS300 to read the codes in seconds and look them up to quickly locate the problem areas, then determine if you can do the repair yourself or go to a mechanic, and clear the codes to get everything back to normal.
  • 【Turn Off Check Engine Light】The check engine light is always annoying you, most of the time because of a little thing, isn't it? Maybe it's just a gas cap that's not tightened but you paid hundreds of dollars for it? With Autel MS300 scan tool, you can read code to quickly find out why the check engine light is on and reset it.
  • 【Help You Pass Annual Smog Check】To pass annual smog check, you are better to make the OBD II Readiness Monitors on your car “Ready”. You don’t want to pay for a failed smoke check. MS300 OBD2 scanner can retrieve I/M Readiness status to check the monitors like misfire, fuel system, catalyst, O2 sensors, EVAP, etc, to help your car ready pass the annual smog check.
  • 【Works On 99% Vehicles & No-Worry Purchase】Autel MaxiScan MS300 car code reader supports all OBD2 protocols: KWP2000, ISO2000, ISO9141, J1850 VPW, J1850 PWM and CAN. It is compatible with 99% OBDII-Compliant vehicles, passenger cars or light trucks. For OBD2 cars, usually, post 1996 for US market, post 2006 for EU market and post 2009 for Asian market. It comes with a 12-month warranty and free lifetime technical support. If you need any technical support, please feel free to contact us.
Rank No. #8
Evan Fischer Catalytic Converter Compatible with 2002-2005 Chevrolet Trailblazer, Fits 2002-2005 GMC Envoy, Fits 2004-2005 Buick Rainier, Fits 2002-2004 Oldsmobile Bravada 4.2L 113 Wheelbase Center
  • Center Catalytic Converter Compatible with 2005 Saab 9-7x, 2002-2004 Oldsmobile Bravada, 2004-2005 Isuzu Ascender, 2002-2005 GMC Envoy, 2002-2005 Chevrolet Trailblazer, 2004-2005 Buick Rainier
  • Interchange Part Number: 50365
  • Catalytic Converter Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME)
  • Length: 50 in. overall length, Tube Material: Aluminized Steel
  • 1-Year Warranty When Purchased through Auto Parts Giant
SaleRank No. #9
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. #10
BBTO Heat Reflective Sheet Adhesive Backed Aluminized Fiberglass Heat Shield Tape Protection Barrier Heat Shield Resistant Material for Hose and Auto Use Heat Insulation Sheet(Silver, 12 x 24 Inch)
  • Size: the aluminized fiberglass sheet measures approx. 30 x 60 cm/ 12 x 24 inch, large size to use in daily life, you can simply trim the sheet into wanted shape or size to satisfy your various projects
  • High temperature resistance: this adhesive backed heat barrier can withstand high temperature, its reflective surface can still screen off the heat and provide utmost protection, effectively protect parts and components, like painted surfaces and plastic parts, from damaging radiant heat
  • Convenient to apply: innovatively designed with adhesive composite on its back, the heat shield protection barrier cover can be easily wrapped or laid on to any desired surfaces with a professional-like finish, make it clean and tidy
  • Multiple applications: the aluminized fiberglass sheet is a helpful addition in your life, can be applied to any cable, wire, plastic components, painted surfaces, doors, hoods for added heat protection, suitable for automotive parts, home repair, computer repair and more, finished edges to avoid fraying
  • Reliable material: this heat shield protection barrier cover is made of glass fiber fabric with an aluminized outer facing, durable and reliable to use, can provide ultimate protection from extreme heat as well as chemical and oil spills, dirt, grease and road grime
Rank No. #11
1PCS Exhaust Clamp - Heavy Duty 304 Stainless Steel Muffler Clamp Pipe Repair Clamp- Emergency Pipe Repair Kit for Various Pipes (2.5inch/1pcs)
  • 【Muffler exhaust repair clamp】: These exhaust clamps are suitable for OD-2.5 inch pipes, width-2.98inch,which can play a good role in fixing, low cost solution to the exhaust pipe resonance, rapid acceleration exhaust resonance problem, a good solution to run high-speed car buzzing sound.
  • 【Pipe repair clamp】:2.5 exhaust clamp, the perfect ring locking design allows the pipe to be subjected to 360° of uniform pressure, thus not deforming and providing a perfect seal. It is not only suitable for repairing exhaust pipes, but also for repairing all kinds of pipes that have leaks or need to be connected.
  • 【High quality】: Good materials determine good quality. To create the most durable automotive replacement exhaust clamps, we use 304 stainless steel, which is resistant to deformation and rust, and is durable and reusable, and can withstand a variety of complex construction environments.
  • 【Easy to install】:Exhaust clamps 2.5 inch no welding required! You will receive matching M10 bolts and nuts, steel spacers and aluminium I-blocks for easy installation without complicated installation steps. The ideal solution for bunching or connecting pipes.
  • 【Satisfactory after-sales guarantee】: In case of quality problems, we are prepared to send you a new one free of charge or a full refund. If you have any dissatisfaction or needs, please email us and thank you for your support!
Rank No. #12
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. #13
Garage-Pro Center Catalytic Converter Compatible with 2002-2005 Chevrolet Trailblazer, Fits 2002-2005 GMC Envoy, Fits 2004-2005 Buick Rainier, Fits 2002-2004 Oldsmobile Bravada 4.2L 113 Wheelbase
  • Direct Replacement Catalytic Converter Compatible with 2002-2005 Chevrolet Trailblazer / GMC Envoy and 2002-2004 Oldsmobile Bravada and 2004-2005 Buick Rainier / Isuzu Ascender and 2005 Saab 9-7x
  • Garage-Pro JCWREPC960310GP Features: Assembly, 1 Sensor Port, Aluminized Steel Tube, Single (3-bolt spinner flange) Inlet, Single (2-bolt welded flange) Outlet, Downstream, 50 in. overall length, N/TB6000/63005NN
  • 46-State Legal (Cannot ship to CA, CO, NY or ME)
  • Interchange Part Number: 50365
  • A high quality, Direct Fit OE Replacement Catalytic Converter, with FREE 1-year UNLIMITED mileage coverage on Garage-Pro items
Rank No. #14
MagnaFlow Catalytic Converter 99006HM: 2.5"/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.
Rank No. #15
OBD2 Scanner Code Reader for Car Check Engine, Automotive CAN Diagnostic Tool, Read and Erase Fault Codes, Check Emission Monitor Status, Universal for All OBD II Protocol Cars After 1996
  • 【New Advantages】: The OBD2 scanner can fully diagnose the car's data. It can determine the cause of the engine light, read code, erase code, view freeze frame, I/M ready, vehicle information, data flow, real-time curve, get vehicle speed information, calculate load value, engine coolant temperature, get engine speed. Six popular languages are supported: English, German, Dutch, Spanish, French, and Italian.
  • 【Save Money & Time】: The automotive diagnostic scanner can quickly diagnose your car at any time, reading and erasing fault codes that may be causing vehicle emission problems in seconds. It helps you detect potential problems and avoid unnecessary excessive repair costs. We recommend that when you find a fault code, please fix the problem before erasing the code.
  • 【Convenient & Portable】: OBD2 diagnostic tool is very easy to use, you just need to plug it into your car's OBD port and turn on the ignition, you will be able to find the problem about your car's engine system and possibly fix it. The compact size of 6.10 x 3.34 inches is easy to grip with one hand, and you can put it in any toolbox or pocket, and it doesn't take up too much space.
  • 【Compatibility】: The car code reader is compatible with 99% of OBDII vehicles. For OBD2 cars, usually, post 1996 for US market, post 2006 for EU market and post 2009 for Asian market. It has a 16pin OBDII standard interface. It requires no additional apps and allows even novices to quickly find and fix car troubles.
  • 【Instructions】: There are 6 buttons on OBD2 Scanner: scroll up/down, enter/exit and buttons that quick query VIN vehicle number& the DTC fault code. If you have any product problems or installation problems, we promise to always provide satisfactory solutions and serve you.
Rank No. #16
MagnaFlow Catalytic Converter 51006: 2.5"/2.5" Inlet/Outlet, OEM 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.
  • 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.
SaleRank No. #17
AP Exhaust 645878 Catalytic Converter
  • Package Dimension : 32.05 " L x 11.72 " W x 7.47 " H
  • Item Package Weight : 12.22 pounds
  • Country of Origin: CHINA
  • Model Number : 645878
Rank No. #18
Offset Oxygen Sensor Socket, 3/8-Inch Drive by 7/8-Inch 22mm, Wire Gate Accesses Sensor from Side, Preventing Damage to Wires, Universal for Most Models of Cars
  • High Quality Material: Offset oxygen sensor socket Made of high-quality chromium-molybdenum steel,the socket allows users to exert maximum torque and allows you to access tough spots, the precision casting ensures accurate fit and function, black oxide surface treatment prevent rust.
  • Design: The standard 6-point slotted design, 7/8 in (22mm) socket hex fits almost all oxygen sensors; Use with 3/8 inch drive ratchet or breaker bar, offset drive gate with wire links the sensor from the side to prevent damage to the wires.very convenient, please rest assured use.
  • Function:Even if you don't have a lot of driving experience, you can replace your oxygen sensor with this high quality tool to help your car's emissions and gas mileage. allows you to remove the oxygen sensor while still connecting the wiring harness, and the socket is biased and compact, providing extra leverage even in hard-to-reach places, this high quality tool will not only save you time but also do exactly what you want.
  • Products Include:1Pcs offset oxygen sensor socket. This high quality tool can save you time! , can meet your daily needs.
  • Service --- If you have any questions about the product, you can contact us by email, we will solve you as soon as possible.
Rank No. #19
Kewucn Car Windshield Cleaning Tool and Glass Defogging Brush, Retractable ABS Plastic Handle & Fine Fiber Auto Glass Cleaning Brush, Universal Car Accessories for Vehicle Maintenance (Blue)
  • 【High-Quality Material】: Car window cleaner exterior scratch free is very soft, comfortable to the touch and grip, beautiful colors, and stain resistant. The fiber bristles are metal-free and will not scratch your car, paint, or any smooth surfaces. A bigger and fuller microfiber head makes cleaning easy.
  • 【Wide Application】: The car detailing truck washing brush is the perfect helper for washing, drying, waxing, dusting, and polishing your vehicles or household. Not only can you wash a truck, bus, SUV, motorcycle, RV, or boat but the is awesome for windows, dusting, ceiling fans, outdoor sheds, boats, kids' slides, and outdoor structures.
  • 【Smart Design】: When you use our windshield cleaning tool, you can freely adjust the length of the handle, 360 ° to clean your car, and multiple constructions connect all the soft and comfortable bristles together, there will be no missing bristles to scratch the car.
  • 【Easy To Cleaning】: The car cleaning window tool can clean car windshield interiors and exteriors without straining and without any chemicals or soap. It is easy to use the extendable handle and microfiber pivoting pad to clean hard-to-reach car window bases.
  • 【Buy with Confidence】: If you have any questions during use, or do not satisfied with the product you received, please contact us. We will reply you and solve the problem for you within 24 hours, customer service team will provide professional solutions in the shortest possible time.
Rank No. #20
MagnaFlow Catalytic Converter 23967: HM Grade, Direct-Fit (EPA Compliant)
  • FEDERAL/EPA COMPLIANT - Extensive testing and certification processes are followed to guarantee that 23967 meets emissions standards set by the Federal EPA.
  • DIRECT-FIT INSTALLATION - State-Of-the-Art 3D scanning is used to ensure this direct-fit catalytic converter perfectly fits your vehicle, enabling do-it-yourself installation. All required hardware is included.
  • CLAMSHELL DESIGN - Durable stainless-steel construction, mandrel bent piping, precisely manufactured flared receivers, OEM-like O2 port locations and integrated butt joints make installation easy while guaranteeing optimal performance. The clamshell design features a continuous seam weld that ensures superior thermal insulation.
  • HM GRADE - Catalytic converter 23967 is 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 emissions warranty included with this MagnaFlow catalytic converter.

Last update on 2023-08-10 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

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