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The Buick Rainier is one of the most successful mid-size SUV models ever sold. Yet it can be upgraded to give even more power than is released by the stock components. Installing a custom exhaust system is one of the easiest ways to boost performance. Stock exhausts, including the Rainier exhaust system, are made in a smaller size than they should be. This is done in an effort to keep the cost of production down. One reason why a custom exhaust system is best for your car is because it has wide exhaust pipes and headers that are a precise fit for the engine. This automatically increases exhaust flow, leaving the engine to perform optimally. As a result, your engine gives more horsepower and torque. Find the best quality custom exhaust systems at CARiD. The shop stocks different exhaust models for the Rainier from top manufacturers such as Flowmaster, MagnaFlow, Borla, Gibson, MBRP, Zunden, Weapon-R and Onki.

With the Flowmaster cat back system for the Rainier, you can expect between 5% and 10% more power. Individual exhaust parts that you can custom fit into the existing exhaust system for a change in tone and performance are catalytic converters, headers and exhaust mid-pipes from Borla, RBP, Flowmaster, Gibson, MagnaFlow, MBRP, Onki and Weapon-R. In addition to increase in power and torque, a custom exhaust will give your Rainier a deeper exhaust note. There are variations in the sound produced by each exhaust system, and you have plenty of options to choose from. From a deep, roaring sound to a mild, controlled rumble or a loud but clean note, you will achieve the sound you want with a custom exhaust from CARiD.

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    • (15 reviews)
      # sp839
      Direct Fit Catalytic Converter by MagnaFlow®. If your cat needs replacement, install one that will get you through the smog check and give you more horsepower. This converter will directly replace the factory unit, with little or...
      Reduces harmful emissionsIncreases exhaust flow compared to original factory converter
      $193.34 - $1,748.68
    • (9 reviews)
      # sp96181
      Direct Fit OEM Grade Catalytic Converter by MagnaFlow®. If your car needs replacement, install one that will get you through the smog check and give you more horsepower. This converter is part of the exhaust header/manifold...
      Reduces harmful emissionsIncreases exhaust flow compared to original factory converter
      $148.97 - $3,460.20
    • (29 reviews)
      # sp7280
      Direct Fit Pre-OBDII Catalytic Converter by MagnaFlow®. If your car needs replacement, install one that will get you through the smog check and give you more horsepower. This converter will directly replace the factory unit, with...
      Converter body manufactured from heavy-duty stainless steelIncreases exhaust flow compared to original factory converter
      $79.39 - $1,057.88
    • (13 reviews)
      # sp7124
      220 Series Stainless Steel Catalytic Converter by Flowmaster®. The new Flowmaster replacement catalytic converters are made to meet and exceed all federal environmental regulations and, as all Flowmaster products, to deliver the...
      Meets or exceeds all USEPA 49-state requirementsStainless Steel shells
      $102.70 - $971.62
    • (18 reviews)
      # sp95451
      Catalytic Converter by Flowmaster®. The new Flowmaster replacement catalytic converters are made to meet and exceed all federal environmental regulations and, as all Flowmaster products, to deliver the best possible performance....
      Exceed all federal emission standardsStainless Steel shells
      $102.70 - $1,101.06
    • (5 reviews)
      # sp20663
      Tuned Length Shorty Headers by BBK®. Primary Tubing Diameter: 1.625". Gain 15-20 dyno-proven horsepower at the rear wheels just by bolting on a set of BBK long tube, full length headers. These premium headers are CAD designed with...
      Dyno testing results show a typical increase of 15-20 horsepower at the rear wheelsDeveloped using CAD (Computer Aided Design) software
      $199.99 - $649.99
    • (0 reviews)
      # sp109957
      Exhausts Performance Upright Headers (Shipping Restrictions) by Flowtech®. Flowtech Headers are the perfect combination of quality and value. Mandrel-bent tubes provide consistent tubing diameters for smooth flow and increases...
      Consistent tubing diameters for smooth flowIncreases the cylinder scavenging effect and improves engine breathing
      $219.95 - $339.95
    • (0 reviews)
      # sp109958
      Exhausts Universal Block Hugger Headers (Shipping Restrictions) by Flowtech®. Flowtech Headers are the perfect combination of quality and value. This tight fit block hugger header fits all popular hot rods. Block Hugger headers are...
      Tight fit block hugger design for popular hot rod and street rodsHeavy duty 16-gauge tubing for increased strength and durability
      $199.95 - $310.95
    • (0 reviews)
      # sp109959
      Exhausts Universal Lakester Series Headers (Shipping Restrictions) by Flowtech®. Flowtech Headers are the perfect combination of quality and value. Flowtech is proud to announce the release of a complete line-up of Lakester...
      High flow, mandrel-bent tubes provide consistent tubing diameters for smooth flow and increased exhaust velocityHeavy duty tubing and high quality welds for increased strength and durability
      $414.95 - $520.95
    • (0 reviews)
      # sp109960
      Exhausts Universal Performance Headers by Flowtech®. Afterburner Thrust Toobs used with open headers are designed to complete the system and squeeze out extra horsepower and torque. Designed to bolt behind any three-bolt header...
      Expertly crafted from premium materials3-Bolt, 3” ID, 12” Long
      $207.95 - $310.95
    • (0 reviews)
      # sp110005
      SlickFit Headers by Advance Adapters®. Finish: Natural.
      $306.32
    • (3 reviews)
      # sp96188
      Universal Fit Catalytic Converter by MagnaFlow®. If your car needs replacement, install one that will get you through the smog check and give you more horsepower. This universal fit converter will require some fabrication to be...
      Reduces harmful emissionsIncreases exhaust flow compared to original factory converter
      $69.27 - $466.66
    • (0 reviews)
      # sp96544
      Header Flange Kit by Moroso®. Material: Aluminum. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...
      High quality at an affordable priceExpertly made from premium materials
      $115.02
    • (0 reviews)
      # mpn358507470
      MLS Exhaust Header Gasket by Cometic Gasket®.
      Made of High Quality MaterialsBuilt to Last
      $31.61
    • (0 reviews)
      # sp87026
      Exhaust Header Gasket by Remflex®. Remflex's unique flexible graphite material has been proven for more than 30 years in industrial applications, where temperatures routinely exceed 2,000 degrees - day after day, week after week,...
      Remflex exhaust gaskets come in a standard 1/8" thickness and are designed to crush 50%. This allows them to fill gaps in the flange surface up to 1/16"100% flexible graphite construction means Remflex gaskets are good for up to 3,000 degrees F - far exceeding that of any vehicle's exhaust system temperature
      $16.47 - $39.19
    • (0 reviews)
      # sp22223
      Exhaust Manifold Gasket Set by Magnum Gasket®. You'd better be ready to take the heat if you're going to seal an exhaust manifold, where temperatures can often exceed 1,000°F. You can count on Magnum to offer the best combination...
      Made of High Quality MaterialsThe best combination of steel layers and high-temp gasket materials
      $5.59 - $24.20
    • (0 reviews)
      # sp107342
      O2 Extension Wire by JBA®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great quality at...
      Built to match your exact requirementsHigh quality you can rely on
      $39.59
    • (25 reviews)
      # sp4409
      Exhaust Gasket by Walker®. With their extensive selection of accessories and hardware for the exhaust system, Walker will provide you with everything needed to do the complete exhaust job. When you choose Walker accessories, you...
      Makes installation quick and easyOptimal OE-style fit and quality
      $1.00 - $199.00
    • (0 reviews)
      # sp104163
      Heavy Duty U-Bolt Clamp by Walker®. With their extensive selection of accessories and hardware for the exhaust system, Walker will provide you with everything needed to do the complete exhaust job. When you choose Walker...
      Makes installation quick and easyOptimal OE-style fit and quality
      $0.91 - $208.50
    • (1 review)
      # sp27192
      GM Original Equipment™ Oxygen Sensor by ACDelco®. If your O2 sensor is not functioning properly, you are robbing yourself of performance and costing yourself money at the gas pump. Let ACDelco’s GM OE Oxygen Sensor help.
      ACDelco GM OE Oxygen Sensors earn the name ACDelco by being put through a variety of tests, often under extreme and unusual conditions.Detects oxygen content in the exhaust gases.
      $14.10 - $216.69
    • (0 reviews)
      # sp27211
      Professional™ Oxygen Sensor by ACDelco®. If your O2 Sensor is not functioning properly, you are robbing yourself of performance and costing yourself money at the gas pump. Let ACDelco’s Professional Oxygen Sensors help. You can...
      ACDelco Professional Oxygen Sensors earn the name ACDelco by being put through a variety of tests, often under extreme and unusual conditions.Customers can receive better gas mileage with a properly working oxygen sensor.
      $18.36 - $241.79
    • (0 reviews)
      # sp107208
      OE Connector Oxygen Sensor by Delphi®. Is your CHECK ENGINE light on? Has your vehicle failed a state emissions test? Your vehicle's emissions control system is in need of repair, but before you waste your time and gas running out...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $36.06 - $259.89
    • (0 reviews)
      # sp5756
      Oxygen Sensor by Delphi®. As one of the leading suppliers of oxygen sensor technology since 1978, Delphi planar technology is the result of their OE and aftermarket engineers partnering together to develop the most innovative...
      OE connectors and wire lengths within three inches of OE specificationsResists high temperatures, vibration damage and wire corrosion to protect signal accuracy, and long life
      $12.24 - $201.38
    • (1 review)
      # sp27974
      Oxygen Sensor by Standard®. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to all channels...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $11.36 - $194.89
    • (1 review)
      # sp99083
      Oxygen Sensor by Bosch®. The Bosch oxygen sensor utilizes a mix of zirconium and yttrium oxides and other elements to form a tough base that withstands the intense stress to which oxygen sensors are subjected. Each element is...
      OE-EquivalentOE Style connectors and wire lengths
      $8.57 - $146.47
    • (0 reviews)
      # sp110090
      Universal O2 Sensor by Bosch®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great quality...
      High quality at an affordable priceExpertly made from premium materials
      $12.86 - $103.79
    • (11 reviews)
      # sp99082
      OE Connector Oxygen Sensor by Denso®. Denso's light duty oxygen sensor started to appear on vehicles with the development of fuel injection systems. The basic job of the sensor is to monitor the air fuel mixture under idle,...
      Designed to help reduce fuel consumption and harmful emissionsMade with the use of state-of-the-art sensor technologies
      $10.69 - $512.39
    • (0 reviews)
      # sp107209
      Oxygen Sensor by Denso®. Make sure your engine runs efficiently and produces fewer emissions by replacing your malfunctioning fuel-ratio sensors with these top-notch products designed by Denso. Engineered with the use of the...
      Designed to help reduce fuel consumption and harmful emissionsMade with the use of state-of-the-art sensor technologies
      $20.11 - $363.90
    • (12 reviews)
      # sp5156
      Oxygen Sensor by NTK®. This product is designed to improve engine efficiency and fuel mileage, while reducing emissions and extending catalyst life. The oxygen sensor is made of premium quality material and extensively tested...
      Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement
      $12.37 - $263.78
    • (3 reviews)
      # sp99297
      Oxygen Sensor by Spectra Premium®. To ensure your vehicle has optimal performance and fuel economy while producing minimal emissions replace a defective O2 sensor with one backed by the aftermarket’s most rigorous testing...
      Increase vehicle fuel economy and engine performance while decreasing vehicle exhaust emissions100% performance tested to meet vehicle requirements
      $8.64 - $272.38
    • (1 review)
      # sp101095
      Exhaust Clamp by AP Exhaust®. This superior product was carefully designed with key attention to detail and manufactured from high-grade materials to the strict standards of the highest quality. This AP Exhaust Technologies product...
      Made from first-rate materialsEnsures outstanding durability
      $1.23 - $7.94
    • (5 reviews)
      # sp109851
      Exhaust Insulator by Walker®. With their extensive selection of accessories and hardware for the exhaust system, Walker will provide you with everything needed to do the complete exhaust job. When you choose Walker accessories, you...
      Makes installation quick and easyOptimal OE-style fit and quality
      $1.16 - $9.79
    • (0 reviews)
      # sp4630
      Exhaust Clamp by Bosal®. Bosal works closely with OEM's across the globe to develop customer tailored solutions. With a focus on every aspect of the customer's needs, from product design to location of manufacture, Bosal's...
      Engineered to provide excellent exhaust system managementBuilt to OEM specifications
      $0.19 - $17.12
    • (1 review)
      # sp93975
      Exhaust Gasket by AP Exhaust®. This superior product was carefully designed with key attention to detail and manufactured from high-grade materials to the strict standards of the highest quality. This AP Exhaust Technologies...
      Made from first-rate materialsEnsures outstanding durability
      $0.82 - $78.80
    • (1 review)
      # sp93989
      Hanger by AP Exhaust®. This superior product was carefully designed with key attention to detail and manufactured from high-grade materials to the strict standards of the highest quality. This AP Exhaust Technologies product...
      Made from first-rate materialsEnsures outstanding durability
      $1.31 - $13.25
    • (0 reviews)
      # sp93904
      GM Original Equipment Exhaust Manifold Gasket by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle,...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $3.83 - $73.39
    • (0 reviews)
      # sp4472
      Exhaust Manifold Gasket Set by Fel-Pro®. If you need durable gaskets to prevent leaks on your vehicle, Fel-Pro is the way to go. Engineered using the latest technologies and global engineering resources, the gaskets meet specific...
      Direct OEM replacement for a proper fitEnsures reliable sealing performance
      $3.09 - $88.76
    • (1 review)
      # sp5611
      Exhaust Manifold Gasket Set by Victor Reinz®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver...
      High quality at an affordable priceExpertly made from premium materials
      $0.92 - $79.69
    • (1 review)
      # sp103872
      Exhaust Manifold Gaskets by Victor Reinz®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver...
      High quality at an affordable priceExpertly made from premium materials
      $0.92 - $79.69
    • (0 reviews)
      # sp5607
      Exhaust Seal Ring by Victor Reinz®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great...
      High quality at an affordable priceExpertly made from premium materials
      $1.42 - $14.31
    • (0 reviews)
      # sp109736
      Multi-Layer Steel Exhaust Manifold Gasket Set by Victor Reinz®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your...
      High quality at an affordable priceExpertly made from premium materials
      $3.72 - $89.51
    • (0 reviews)
      # sp41620
      Exhaust Manifold Gasket by Mahle®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great...
      High quality at an affordable priceExpertly made from premium materials
      $8.93 - $19.17
    • (1 review)
      # sp109746
      Exhaust Manifold Gasket Set by DNJ Engine Components®. Get this top-grade quality replacement for your worn out part from DNJ. Expertly crafted from premium materials, this product is of the finest quality to provide you with...
      Designed to restore your vehicle's original performanceProvides superior sealing performance
      $1.60 - $60.37
    • (5 reviews)
      # sp4621
      Exhaust Flange Gasket by Bosal®. Bosal works closely with OEM's across the globe to develop customer tailored solutions. With a focus on every aspect of the customer's needs, from product design to location of manufacture, Bosal's...
      Engineered to provide excellent exhaust system managementBuilt to OEM specifications
      $0.98 - $25.15
    • (1 review)
      # sp4473
      Exhaust Pipe Flange Gasket by Fel-Pro®. If you need durable gaskets to prevent leaks on your vehicle, Fel-Pro is the way to go. Engineered using the latest technologies and global engineering resources, the gaskets meet specific...
      Direct OEM replacement for a proper fitEnsures reliable sealing performance
      $0.98 - $30.35
    • (0 reviews)
      # sp5609
      Exhaust Pipe Flange Gasket by Victor Reinz®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver...
      High quality at an affordable priceExpertly made from premium materials
      $1.25 - $22.29
    • (1 review)
      # sp41618
      Exhaust Flange Gasket by Mahle®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great...
      High quality at an affordable priceExpertly made from premium materials
      $5.91 - $5.92
    • (0 reviews)
      # sp106488
      Exhaust Flange Stud and Nut by Dorman®. Dorman’s Exhaust Flange Stud & Nut provides you with the proper flange stud and nut for replacing your manifold. Save time and energy by having the right hardware on hand when you need it.
      Direct replacement for a proper fit every timeDurable steel construction
      $4.49 - $19.15
    • (1 review)
      # sp25375
      Exhaust Manifold Hardware Kit by Dorman®. Dorman manifold bolt and spring kits are just what you need to secure the front flange. These exhaust flange hardware kits are made of steel with a black finish and include a shoulder bolt,...
      Direct replacement for a proper fitBuilt to Last
      $6.02 - $48.38
    • (0 reviews)
      # sp27193
      GM Original Equipment™ Oxygen Sensor Connector by ACDelco®. If your O2 Sensor is not functioning properly, you are robbing yourself of performance and costing yourself money at the gas pump. Let ACDelco’s Oxygen Sensors help....
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $10.02 - $77.87
    • (0 reviews)
      # sp27212
      Professional™ Oxygen Sensor Connector by ACDelco®. If your O2 Sensor is not functioning properly, you are robbing yourself of performance and costing yourself money at the gas pump. Let ACDelco’s Professional Oxygen Sensors...
      ACDelco Professional Oxygen Sensors earn the name ACDelco by being put through a variety of tests, often under extreme and unusual conditions.Customers can receive better gas mileage with a properly working oxygen sensor.
      $6.10 - $43.13
    • (0 reviews)
      # sp107220
      Oxygen Sensor Connector by Dorman®. Dorman offers a comprehensive line of Oxygen Sensor Connectors for a wide range of applications. All Dorman Oxygen Sensor Connectors are constructed of high-quality materials for long-lasting...
      No special tools required for installationEasy to install
      $7.84 - $28.93
    • (0 reviews)
      # sp27975
      Oxygen Sensor Connector by Standard®. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $14.71 - $56.39
    • (0 reviews)
      # sp92963
      Exhaust Manifold Hardware Kit by Stage 8®. Thread Pitch: 3/8"-16. Stage 8 manufacturers the World's Best Active Mechanical Locking systems. Stage 8 locking fastener solutions are fail-safe when used and installed as directed. They...
      High quality at an affordable priceExpertly made from premium materials
      $46.80 - $62.31
    • (0 reviews)
      # sp92964
      Header Locking Bolt Kit by Stage 8®. Stage 8 manufacturers the World's Best Active Mechanical Locking systems. Stage 8 locking fastener solutions are fail-safe when used and installed as directed. They are removable and reusable...
      High quality at an affordable priceExpertly made from premium materials
      $32.66 - $112.85
    • (0 reviews)
      # sp92965
      Header Locking Bolt Kit-H by Stage 8®. Stage 8 manufacturers the World's Best Active Mechanical Locking systems. Stage 8 locking fastener solutions are fail-safe when used and installed as directed. They are removable and reusable...
      Thoughtfully designed for the highest efficiency and safetyWill provide more breakaway torque than any other locking system
      $20.00 - $112.85
    • (0 reviews)
      # sp110004
      Performance Headers by Advance Adapters®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver...
      High quality at an affordable priceExpertly made from premium materials
      $269.14 - $386.13
    • (0 reviews)
      # sp109951
      Roadster Exhaust Headers by Patriot Exhaust®. This superior Patriot EXhaust product is just for you. Carefully designed for maximum performance, is will more than just meet your needs and expectations. This product is built from...
      Expertly crafted from premium materialsQuality design and workmanship
      +1
      $268.98 - $619.49
    • (0 reviews)
      # sp109953
      Street Rod Sprint Exhaust Headers by Patriot Exhaust®. This superior Patriot EXhaust product is just for you. Carefully designed for maximum performance, is will more than just meet your needs and expectations. This product is...
      Expertly crafted from premium materialsQuality design and workmanship
      $267.16 - $517.92
    • (1 review)
      # 285612371
      Universal 304 SS Chambered Round Mill Exhaust Muffler by Stainless Works®. Muffler Body Length: 30". Muffler Sound: Aggressive / Loud. Muffler Configuration: Center - Center. Stainless Works is the only manufacturer to build all of...
      Designed to meet strict quality standardsCarefully crafted from first-rate stainless steel
      $166.25




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