2004 Buick Rainier Performance Exhaust Systems

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    • BBK® Tuned-Length Shorty™ Headers
      (1 reviews)
      # 55185618
      Buick Rainier 5.3L 2004, Exhaust Headers by BBK®. 1.75" Diameter. Full length headers increase exhaust flow and provide optimal cylinder scavenging for improved power and performance. CAD designed and dyno tested long tube headers...
      Dyno testing results show a typical increase of 15-20 horsepower at the rear wheelsDeveloped using CAD (Computer Aided Design) software
      $349.99 - $449.99
    • Flowmaster® Direct Fit Stainless Steel Catalytic Converter with Ceramic Substrate
      (1 reviews)
      # 2154281
      Buick Rainier 4.2L 2004, Direct Fit Stainless Steel Catalytic Converter by Flowmaster®. 2.5" Inlet / 2.5" Outlet. Substrate Material: Ceramic. Inlet Connection Type: Flanged. Outlet Connection Type: Flanged. With Pre And Post-Cat...
      Exceed all federal emission standardsStainless Steel shells
      $240.80
    • MagnaFlow® Direct Fit Federal OBDII Catalytic Converter
      (0 reviews)
      # 22198082
      Buick Rainier 4.2L 2004, Direct Fit Federal OBDII Catalytic Converter by MagnaFlow®. 12.38" Width. Includes Gasket, O2 Sensor Ports. Without Air Tube. If your car needs replacement, install one that will get you through the smog...
      Converter body manufactured from heavy-duty stainless steelIncreases exhaust flow compared to original factory converter
      $272.58
    • MagnaFlow® Direct Fit Federal OEM Grade Catalytic Converter
      (0 reviews)
      # 22198891
      Buick Rainier 4.2L 2004, Direct Fit Federal OEM Grade Catalytic Converter by MagnaFlow®. 2.5" Inlet / 2.5" Outlet Diameter. 12.38" Width. Includes Gasket, O2 Sensor Ports. Without Air Tube. If your car needs replacement, install...
      Converter body manufactured from heavy-duty stainless steelIncreases exhaust flow compared to original factory converter
      $331.40
    • Dorman® Exhaust Manifold
      (0 reviews)
      # 16496771
      Buick Rainier 2004, Exhaust Manifold by Dorman®. Package Quantity: 1. More like a complete kit than a single part, many of the Exhaust Manifolds include gaskets and hardware for a complete installation. Since this part is a direct...
      Cast iron or stainless tubular construction protects against warping and/or crackingLeak-resistant for long-lasting performance
      $113.05 - $115.24
    • Walker® CalCat™ Small Oval Universal Fit Catalytic Converter
      (0 reviews)
      # 87065341
      Buick Rainier 5.3L 2004, CalCat™ Small Oval Universal Fit Catalytic Converter by Walker®. Inlet Diameter 1: 2.5". Outlet Diameter: 2.5". Overall Length: 13.25". Body Dimensions: 10" Length x 6.125" Width x 3.875" Height. Inlet /...
      EPA & CARB Emissions Products Available for Most Vehicles5 Year / 50,000 Miles Warranty on Structural Components
      $144.59
    • Walker® Ultra™ Round Direct Fit Catalytic Converter
      (1 reviews)
      # 17743759
      Buick Rainier 4.2L with Federal Emission 2004, Ultra™ Round Direct Fit Catalytic Converter by Walker®. Overall Length: 48.5". Body Dimensions: 9" Length x 4.125" Width x 4.125" Height. Inlet / Outlet Quantity: 1 Inlet / 1 Outlet....
      Emission Warranty: 5 Years / 50,000 Miles (80,000 Kilometers)Structural Warranty: 5 Years / 50,000 Miles (80,000 Kilometers)
      $185.84
    • Walker® Ultra™ Round Universal Fit Catalytic Converter
      (0 reviews)
      # 17734141
      Buick Rainier 4.2L 2004, Ultra™ Round Universal Fit Catalytic Converter by Walker®. Inlet Diameter 1: 2.5". Outlet Diameter: 2.5". Overall Length: 11.5". Body Dimensions: 10" Length x 4.375" Width x 4.5" Height. Inlet / Outlet...
      Emission Warranty: 5 Years / 50,000 Miles (80,000 Kilometers)Structural Warranty: 5 Years / 50,000 Miles (80,000 Kilometers)
      $85.93
    • Eastern® ECO II Direct Fit Catalytic Converter
      (0 reviews)
      # 17568609
      Buick Rainier 4.2L 2004, ECO II Direct Fit Undercar Catalytic Converter by Eastern®. 50" Overall Length. Inlet Type 1: 3 Bolt Spin Type Inlet Flange. Outlet Type 1: 2 Bolt Welded Outlet Flange. With One Oxygen Sensor Port. Oxygen...
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $211.13
    • Eastern® ECO II Universal Fit Catalytic Converter
      (0 reviews)
      # 17568683
      Buick Rainier 4.2L Over 8500 Lbs GVW Federal Emission 2004, ECO II Universal Fit Undercar Catalytic Converter by Eastern®. 14" Overall Length. Inlet Type 1: 2.5" ID. Outlet Type 1: 2.5" OD. Whether your catalytic converter is...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $64.60
    • DEC® Direct Fit Catalytic Converter
      (0 reviews)
      # 86066404
      Buick Rainier 4.2L 2004, Direct Fit Catalytic Converter by DEC®. Pick out a catalytic converter by DEC and get your emissions back into check without worrying to fail again. These catalytic converters are made from a heavy duty...
      Direct fitMade from a heavy duty stainless steel outer shell
      $273.00
    • AP Exhaust® 608 Series Catalytic Converter
      (0 reviews)
      # 81396117
      Buick Rainier CARB Compliant / EPA Compliant 2004, 608 Series Catalytic Converter by AP Exhaust®. Three-Way No / Air OBDII By Design US-EPA Compliant catalytic converters are efficient at the oxidation of HC’s and CO, and very...
      Manufactured from high quality materialsDesign meet needs of OBDII equipped vehicles
      $89.29 - $89.76
    • AP Exhaust® Direct Fit Catalytic Converter
      (0 reviews)
      # 80125777
      Buick Rainier CARB Compliant / EPA Compliant 2004, Direct Fit Catalytic Converter by AP Exhaust®. The growing concern for the environment means there is a growing need for quality emission control products. AP catalysts and...
      Manufactured from high quality materialsDesign meet needs of OBDII equipped vehicles
      $234.25 - $451.98
    • Walker® Aluminized Oval Resonator Assembly
      (0 reviews)
      # 18166439
      Buick Rainier 4.2L 2004, Aluminized Oval Resonator Assembly by Walker®. Inlet Diameter 1: 2.5". Outlet Diameter: 2.5". Overall Length: 58.87". Body Dimensions 1: 13" Length x 7" Width x 9" Height. Inlet / Outlet Quantity: 1 Inlet /...
      Designed to directly replace the factory partMade with precision benders and fixture checked
      $92.13
    • Walker® Quiet-Flow™ Stainless Steel Aluminized Oval Muffler
      (0 reviews)
      # 18163172
      Buick Rainier 4.2L 2004, Quiet-Flow™ Aluminized Oval Muffler by Walker®. Inlet Diameter 1: 2.5". Inlet Configuration: Center. Outlet Diameter: 2.5". Outlet Configuration: Offset. Overall Length: 38.4375". Inlet / Outlet Quantity:...
      Designed for OE equivalent sound and precision fitSpun-locked heads for a proper resistance to backfire
      $104.11
    • Walker® SoundFX™ Stainless Steel Aluminized Oval Direct Fit Muffler
      (0 reviews)
      # 18171099
      Buick Rainier 4.2L 2004, SoundFX™ Aluminized Oval Direct Fit Muffler by Walker®. Inlet Diameter 1: 2.75". Inlet Configuration: Center. Outlet Diameter: 2.5". Outlet Configuration: Offset. Overall Length: 38.5". Inlet / Outlet...
      Designed to deliver ultimate performance and pleasing sound qualityOE-equivalent direct-fit design
      $77.54
    • Walker® SoundFX™ Stainless Steel Oval Muffler
      (0 reviews)
      # 46779048
      Buick Rainier 4.2L 2004, SoundFX™ Oval Muffler by Walker®. Inlet Diameter 1: 2.5". Inlet Configuration: Center. Outlet Diameter: 2.5". Outlet Configuration: Offset. Overall Length: 31". Inlet / Outlet Quantity: 1 Inlet / 1...
      Designed to deliver ultimate performance and pleasing sound qualityUniversal fit – may require a few modifications to install
      $32.20
    • AP Exhaust® Challenge Series Muffler
      (0 reviews)
      # 80125774
      Buick Rainier 4.2L 2004, Challenge Series Muffler by AP Exhaust®. Body Shape: Oval. This superior product was carefully designed with key attention to detail and manufactured from high-grade materials to the strict standards of the...
      Limited Lifetime Warranty backed by AP Exhaust Products100% aluminized components
      $68.79 - $98.40
    • AP Exhaust® MSL Maximum Direct Fit Muffler
      (0 reviews)
      # 80125783
      Buick Rainier 4.2L 2004, MSL Maximum Direct Fit Muffler by AP Exhaust®. Body Shape: Oval. This superior product was carefully designed with key attention to detail and manufactured from high-grade materials to the strict standards...
      Designed for a quiet ride100% aluminized components for longer life
      $48.41 - $60.04
    • Walker® Intermediate Pipe
      (0 reviews)
      # 60804127
      Buick Rainier 4.2L 2004, Intermediate Pipe by Walker®. Inlet Diameter 1: 3". Outlet Diameter: 2.5". Overall Length: 11.42". Inlet Connection Type: 2 Bolt Welded Flange. Outlet Connection Type: Pipe Connection. With their extensive...
      Made of High Quality Aluminized SteelCorrosion Resistant
      $30.13
    • Dorman® Exhaust Manifold Hardware Kit
      (0 reviews)
      # 69858133
      Buick Rainier 4.2L 2004, Exhaust Manifold Hardware Kit by Dorman®. Size: M8-1.25 x 30mm; Package Quantity: 1. More like a complete kit than a single part, many of the Exhaust Manifolds include gaskets and hardware for a complete...
      Cast iron or stainless tubular construction protects against warping and/or crackingLeak-resistant for long-lasting performance
      $8.84
    • Walker® U-Bolt Clamp
      (0 reviews)
      # 18129523
      Buick Rainier 4.2L 2004, U-Bolt Clamp by Walker®. Diameter: 2.5". Inlet / Outlet Quantity: 1 Inlet / 1 Outlet. With their extensive selection of accessories and hardware for the exhaust system, Walker will provide you with...
      Makes installation quick and easyOptimal OE-style fit and quality
      $2.24
    • Bosal® Exhaust Clamp
      (0 reviews)
      # 20552573
      Buick Rainier 4.2L 2004, Exhaust Clamp by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $2.10
    • AP Exhaust® Extra Heavy Duty Welded Saddle Clamp
      (0 reviews)
      # 80393114
      Buick Rainier 4.2L 2004, Extra Heavy Duty Welded Saddle 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...
      Made from first-rate materialsEnsures outstanding durability
      $2.38 - $3.98
    • Fel-Pro® Exhaust Manifold Gasket Set
      (0 reviews)
      # 19058908
      Buick Rainier 2004, 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...
      Direct OEM replacement for a proper fitEnsure reliable sealing performance
      $10.67 - $13.65
    • Walker® Donut Exhaust Gasket
      (0 reviews)
      # 18145059
      Buick Rainier 4.2L 2004, Donut Exhaust Gasket by Walker®. Inlet / Outlet Quantity: 1 Inlet / 1 Outlet. Thickness: 0.969". Port Dimensions: 2.516" Length x 2.516" Width. With their extensive selection of accessories and hardware for...
      Makes installation quick and easyOptimal OE-style fit and quality
      $9.95
    • Fel-Pro® Exhaust Pipe Flange Gasket
      (0 reviews)
      # 19064502
      Buick Rainier 2004, 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...
      Direct OEM replacement for a proper fitEnsure reliable sealing performance
      $6.60 - $8.53
    • Victor Reinz® Exhaust Manifold Gasket
      (1 reviews)
      # 24062114
      Buick Rainier 2004, Exhaust Manifold Gasket by Victor Reinz®, Use 1 per Car. OEM Standard. Material: Multi-Layered Steel. When you’re low on oil, coolant or some other fluid, you may be tempted to just run down to the local auto...
      $9.70 - $14.48
    • Victor Reinz® Exhaust Pipe Flange Gasket
      (0 reviews)
      # 24042355
      Buick Rainier 4.2L 2004, Exhaust Pipe Flange Gasket by Victor Reinz®, Use 1 per Car. OEM Standard. Material: Graphite/Wire Mesh With Sleeve. When you’re low on oil, coolant or some other fluid, you may be tempted to just run down...
      $9.93
    • Victor Reinz® Exhaust Seal Ring
      (0 reviews)
      # 24062132
      Buick Rainier 5.3L 2004, Exhaust Seal Ring by Victor Reinz®, Use 1 per Car. Exhaust Pipe to Manifold. OEM Standard. Type 'E'. When you’re low on oil, coolant or some other fluid, you may be tempted to just run down to the local...
      $6.01 - $6.91
    • Mahle® Exhaust Flange Gasket
      (0 reviews)
      # 8548073
      Buick Rainier 5.3L 2004, Exhaust Flange Gasket by Mahle®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before...
      $7.63 - $8.55
    • DNJ Engine Components® Exhaust Manifold Gasket Set
      (0 reviews)
      # 81856538
      Buick Rainier 2004 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...
      Designed to restore your vehicle's original performanceProvides superior sealing performance
      $10.65 - $12.41
    • Walker® Universal Fit Manifold Converter
      (0 reviews)
      # 85226038
      Buick Rainier 5.3L with Federal Emission 2004, Universal Fit Manifold Converter by Walker®. This component is constructed for your vehicle’s specific emissions requirements and designed to meet EPA regulations. The part features...
      Constructed to meet your vehicle’s specific emissions requirements49-State legal and 50-State legal catalytic converters are available
      $76.05
    • Dorman® Front Exhaust Flange Stud and Nut
      (0 reviews)
      # 31663396
      Buick Rainier 2004, Front Exhaust Flange Stud and Nut by Dorman®. Size: M10-1.5 x 62mm; Package Quantity: 1; Package Type: Card. This is an aftermarket part that replaces factory OE # 10220453. Dorman’s Exhaust Flange Stud & Nut...
      Direct replacement for a proper fit every timeDurable steel construction
      $9.92
    • Flowmaster® 200 Series OBDII Round Catalytic Converter
      (2 reviews)
      # 492248
      Universal 200 Series OBDII Stainless Steel Round Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Slip-Fit. Without O2 Sensor Port. The new Flowmaster replacement catalytic converters are made to meet and exceed...
      Exceed all federal emission standardsStainless Steel shells
      $116.53 - $204.95
    • Flowmaster® 220 Series Oval Catalytic Converter
      (5 reviews)
      # 87243712
      Universal 220 Series Stainless Steel Oval Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Slip-Fit. Without O2 Sensor Port. The new Flowmaster replacement catalytic converters are made to meet and exceed all...
      Exceed all federal emission standardsStainless Steel shells
      $68.56
    • Flowmaster® 222 Series Round Catalytic Converter
      (5 reviews)
      # 87243734
      Universal 222 Series Stainless Steel Round Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Slip-Fit. Without O2 Sensor Port. The new Flowmaster replacement catalytic converters are made to meet and exceed all...
      Exceed all federal emission standardsStainless Steel shells
      $67.12
    • Flowmaster® 223 Series Round Catalytic Converter
      (2 reviews)
      # 492138
      Universal 223 Series Stainless Steel Round Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Slip-Fit. Without O2 Sensor Port. The new Flowmaster replacement catalytic converters are made to meet and exceed all...
      Exceed all federal emission standardsStainless Steel shells
      $73.86
    • Flowmaster® 225 Series Oval Catalytic Converter
      (2 reviews)
      # 492154
      Universal 225 Series Stainless Steel Oval Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Slip-Fit. Without O2 Sensor Port. The new Flowmaster replacement catalytic converters are made to meet and exceed all...
      Exceed all federal emission standardsStainless Steel shells
      $68.02 - $71.98
    • Flowmaster® 240 Series Oval Catalytic Converter
      (7 reviews)
      # 87243745
      Universal 240 Series Stainless Steel Oval Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Slip-Fit. Without O2 Sensor Port. The new Flowmaster replacement catalytic converters are made to meet and exceed all...
      Exceed all federal emission standardsStainless Steel shells
      $141.53 - $144.93
    • Flowmaster® 250 Series Oval Catalytic Converter
      (5 reviews)
      # 87243747
      Universal 250 Series Stainless Steel Oval Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Slip-Fit. Without O2 Sensor Port. The new Flowmaster replacement catalytic converters are made to meet and exceed all...
      Exceed all federal emission standardsStainless Steel shells
      $130.99 - $147.34
    • Flowmaster® 260 Series Stainless Steel Oval Catalytic Converter (2600230)
      (5 reviews)
      # mpn886220
      Universal 260 Series Stainless Steel Oval Catalytic Converter without Air Tube by Flowmaster®. 3" Inlet / 3" Outlet Diameter, 21.5" Length. Inlet / Outlet Connection Type: Slip-Fit. Without O2 Sensor Port. The new Flowmaster...
      Exceed all federal emission standardsStainless Steel shells
      $247.74
    • Flowmaster® 282 Series OBDII Catalytic Converter
      (7 reviews)
      # 492281
      Universal 282 Series OBDII 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,...
      Exceed all federal emission standardsStainless Steel shells
      $102.20 - $142.92
    • Flowmaster® 283 Series OBDII Round Catalytic Converter
      (2 reviews)
      # 3138250
      Universal 283 Series OBDII Stainless Steel Round Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Slip-Fit. The new Flowmaster replacement catalytic converters are made to meet and exceed all federal...
      Exceed all federal emission standardsStainless Steel shells
      $110.23 - $127.74
    • Flowmaster® 284 Series OBDII Oval Catalytic Converter
      (2 reviews)
      # 87281464
      Universal 284 Series OBDII Stainless Steel Oval Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Slip-Fit. Without O2 Sensor Port. The new Flowmaster replacement catalytic converters are made to meet and exceed...
      Exceed all federal emission standardsStainless Steel shells
      $187.88
    • Flowmaster® 290 Series Oval Catalytic Converter
      (5 reviews)
      # 87243764
      Universal 290 Series Stainless Steel Oval Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Slip-Fit. The new Flowmaster replacement catalytic converters are made to meet and exceed all federal environmental...
      Exceed all federal emission standardsStainless Steel shells
      $108.66 - $128.44
    • Flowmaster® 3512 Series OBDII Stainless Steel Oval Catalytic Converter (3512025)
      (2 reviews)
      # mpn918025
      Universal 3512 Series OBDII Stainless Steel Oval Catalytic Converter without Air Tube by Flowmaster®. 2.5" Inlet / 2.5" Outlet Diameter, 14.25" Length. Inlet / Outlet Connection Type: Clamp-On. The new Flowmaster replacement...
      Exceed all federal emission standardsStainless Steel shells
      $163.39
    • Flowmaster® 3588 Series Pre-OBDII Round Catalytic Converter
      (2 reviews)
      # 23000953
      Universal 3588 Series Pre-OBDII Stainless Steel Round Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Slip-Fit. The new Flowmaster replacement catalytic converters are made to meet and exceed all federal...
      Exceed all federal emission standardsStainless Steel shells
      $197.80
    • Flowmaster® 3589 Series Pre-OBDII Round Catalytic Converter
      (2 reviews)
      # 23000959
      Universal 3589 Series Pre-OBDII Stainless Steel Round Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Slip-Fit. The new Flowmaster replacement catalytic converters are made to meet and exceed all federal...
      Exceed all federal emission standardsStainless Steel shells
      $218.19 - $343.62
    • Flowmaster® 3612 Series OBDII Stainless Steel Oval Catalytic Converter (3612024)
      (2 reviews)
      # mpn918033
      Universal 3612 Series OBDII Stainless Steel Oval Catalytic Converter without Air Tube by Flowmaster®. 2.25" Inlet / 2.25" Outlet Diameter, 12.25" Length. Inlet / Outlet Connection Type: Clamp-On. The new Flowmaster replacement...
      Exceed all federal emission standardsStainless Steel shells
      $185.80
    • Flowmaster® 3612 Series Stainless Steel Oval Catalytic Converter (3612125)
      (2 reviews)
      # mpn918035
      Universal 3612 Series Stainless Steel Oval Catalytic Converter without Air Tube by Flowmaster®. 2.5" Inlet / 2.5" Outlet Diameter, 12.25" Length. Inlet / Outlet Connection Type: Clamp-On. The new Flowmaster replacement catalytic...
      Exceed all federal emission standardsStainless Steel shells
      $146.59
    • Flowmaster® 3910 Series OBDII Stainless Steel Round Catalytic Converter (3910124)
      (2 reviews)
      # mpn918036
      Universal 3910 Series OBDII Stainless Steel Round Catalytic Converter without Air Tube by Flowmaster®. 2.25" Inlet / 2.25" Outlet Diameter, 14.25" Length. Inlet / Outlet Connection Type: Clamp-On. The new Flowmaster replacement...
      Exceed all federal emission standardsStainless Steel shells
      $271.21
    • Flowmaster® 3912 Series OBDII Catalytic Converter
      (2 reviews)
      # 23000943
      Universal 3912 Series OBDII Stainless Steel Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Clamp-On. The new Flowmaster replacement catalytic converters are made to meet and exceed all federal environmental...
      Exceed all federal emission standardsStainless Steel shells
      $215.14 - $269.17
    • Flowmaster® 3932 Series Pre-OBDII Round Catalytic Converter
      (2 reviews)
      # 23000964
      Universal 3932 Series Pre-OBDII Stainless Steel Round Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Slip-Fit. The new Flowmaster replacement catalytic converters are made to meet and exceed all federal...
      Exceed all federal emission standardsStainless Steel shells
      $218.19
    • Flowmaster® 3938 Series Pre-OBDII Stainless Steel Round Catalytic Converter (3938024)
      (2 reviews)
      # mpn918043
      Universal 3938 Series Pre-OBDII Stainless Steel Round Catalytic Converter without Air Tube by Flowmaster®. 2.25" Inlet / 2.25" Outlet Diameter, 13" Length. Inlet / Outlet Connection Type: Clamp-On. The new Flowmaster replacement...
      Exceed all federal emission standardsStainless Steel shells
      $198.83
    • Flowmaster® 3940 Series OBDII Catalytic Converter
      (2 reviews)
      # 23000946
      Universal 3940 Series OBDII Stainless Steel Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Clamp-On. The new Flowmaster replacement catalytic converters are made to meet and exceed all federal environmental...
      Exceed all federal emission standardsStainless Steel shells
      $229.41 - $294.68
    • Flowmaster® 3981 Series Pre-OBDII Round Catalytic Converter
      (2 reviews)
      # 23000970
      Universal 3981 Series Pre-OBDII Stainless Steel Round Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Clamp-On. The new Flowmaster replacement catalytic converters are made to meet and exceed all federal...
      Exceed all federal emission standardsStainless Steel shells
      $215.14
    • Flowmaster® 3982 Series Pre-OBDII Oval Catalytic Converter
      (2 reviews)
      # 23000973
      Universal 3982 Series Pre-OBDII Stainless Steel Oval Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Clamp-On. The new Flowmaster replacement catalytic converters are made to meet and exceed all federal...
      Exceed all federal emission standardsStainless Steel shells
      $215.14
    • Flowmaster® 3983 Series Pre-OBDII Stainless Steel Oval Catalytic Converter (3983025)
      (2 reviews)
      # mpn918050
      Universal 3983 Series Pre-OBDII Stainless Steel Oval Catalytic Converter without Air Tube by Flowmaster®. 2.5" Inlet / 2.5" Outlet Diameter, 16.5" Length. Inlet / Outlet Connection Type: Clamp-On. The new Flowmaster replacement...
      Exceed all federal emission standardsStainless Steel shells
      $215.14
    • Flowmaster® 3998 Series Pre-OBDII Round Catalytic Converter
      (2 reviews)
      # 23000976
      Universal 3998 Series Pre-OBDII Stainless Steel Round Catalytic Converter by Flowmaster®. Inlet / Outlet Connection Type: Clamp-On. The new Flowmaster replacement catalytic converters are made to meet and exceed all federal...
      Exceed all federal emission standardsStainless Steel shells
      $190.67




    Guides & Articles

    • Performance Parts
      Engines have often been compared to air pumps, because the engine that’s most efficient in terms of economy and power is the one that can get air in and out of its cylinders the easiest. That’s why most performance modifications like conical air filters, cold air intake systems, headers, and cat-back exhaust systems are aimed at making the intake and exhaust systems less restrictive. These parts increase the flow of air into the engine and ease the flow of exhaust gas out of the engine. Among these components, headers may be the most difficult to install. In this article, we’ll discuss what headers do, their different types, and how much performance they can add to your car.
    • Performance Parts
      You may be wondering why so many aftermarket performance exhaust system manufacturers are offering dual exhaust systems connected by "H-pipe" or "X-pipe" sections. After all, aren't two separate pipes, or so-called "true duals", the best for performance? The answer is no, but to understand why we have to examine how a typical internal combustion engine works.
    • Performance Parts
      It's an age-old question that many have asked. Will an aftermarket exhaust be worth the expense? While they definitely can be, an important question to ask yourself is do you care more about the deeper sound they’re designed to produce, or the added performance gained from being less restrictive? As car enthusiasts, we’ve become accustomed to associating the sound of a car with its exhaust. After all, doesn’t everyone have a childhood memory or two of a car and the particular sound it made?
    • Performance Parts
      Regardless of whether you're shopping for a simple replacement muffler that delivers original equipment (OE) sound and performance or an upgraded muffler which provides a deeper growl with increased power through freer exhaust flow, you'll see choices between "direct fit" mufflers and "universal" mufflers. In this article, we'll help you understand the differences between these two styles so you can make a more informed purchase.

    Popular Products

    2004 Buick Rainier Performance Exhaust Systems Reviews

    Average rating:  4.5  4.5 - 77 reviews
    4 of 5
    Supper Cool Sound!
    I bought this for my Mitsubishi and it sounds awesome! It's got a 3.5 l v6 and it makes it sound like its very souped up! And almost like it has a v8 in it. I couldn't be more happy with this product the sound will blow your mind on whatever you choose to put it on whether it be a six cylinder like I put it on or a v8 very much recommend this product if you want a really nearly sound.
    SPosted by Shawn (Shakopee, MN) /
    Was this review helpful for you? Yes1   people found this review helpful.
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