2011 Subaru WRX Emission Control

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    • (0 reviews)
      # 35994415
      Subaru WRX 2458 CC 2011, Premium Oxygen Sensor by Bosch®. A worn-out oxygen sensor can cause engine performance problems and shorten the life of the catalytic converter. Tune-up your vehicle with an Oxygen Sensor from Bosch that...
      Up to 15 % savings in fuel costsReduced CO2 emissions
      $60.71 - $135.78
    • (0 reviews)
      # 21061381
      Subaru WRX 2458 CC 2011, Downstream OE Connector Oxygen Sensor by Denso®. Heated. Screw Type. 4 Wires. Denso's light duty oxygen sensor started to appear on vehicles with the development of fuel injection systems. The basic job of...
      Corrosion-resistant stainless steel constructionPTFE filter blocks efficiency-robbing contaminants
      $56.21 - $71.54
    • (0 reviews)
      # 21104234
      Subaru WRX 2458 CC 2011, Upstream OE Connector Air Fuel Ratio Sensor by Denso®. 4 Wires. The air/fuel ratio sensor sends information to the engine management computer to makes adjustments based on driving conditions. This wider...
      Tarnish-proof platinum electrodes provides longer life and maintains accuracyQuick-response planar zircon element can quickly detect oxygen concentration
      $123.45
    • (0 reviews)
      # 8739937
      Subaru WRX STI EJ257 Engine 2011, Air Fuel Ratio Sensor by Walker Products Inc.®. Is your vehicle hard to start? Does its stumble and stall, and idle rough? Are you making more frequent visits to the pump? Your fuel system may need...
      OE quality parts from top original equipment and aftermarket manufacturersFast shipping; 1-2 day delivery time regardless of where you’re located
      $169.26
    • (0 reviews)
      # 8739942
      Subaru WRX 2011, OE Connector Oxygen Sensor by Walker Products Inc.®. Position: Rear. 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,...
      $92.25 - $100.51
    • (0 reviews)
      # 78810198
      Subaru WRX 2011, Upstream Air-Fuel Ratio Sensor by NTK®. OE Replacement. Air/Fuel ratio sensors utilize a sophisticated sensing element that enables them to produce a precise output in proportion to the air/fuel ratio. AFR sensors...
      Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement
      $137.58 - $142.90
    • (0 reviews)
      # 78810201
      Subaru WRX 2011, Downstream Oxygen Sensor by NTK®. OE Replacement. 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...
      Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement
      $71.33
    • (0 reviews)
      # 8801306
      Subaru WRX STI 2011, PCV Valve by Genuine®. Do you hear a humming or growling sound as you drive, or a clicking or clunking noise when cornering? If so, your vehicle may need wheel bearing or drive axle repairs. But before you...
      $23.87
    • (0 reviews)
      # 85013499
      Subaru WRX 2011, Air-Oil Separator by Moroso®. With this quality part backed by a great price, you can enjoy your vehicle so much more than you thought was possible. This Moroso part is specifically engineered to make your vehicle...
      Plumbed into a vehicle's PCV system to capture the excess crankcase vapors, residual oil mist and moisture from reentering the intake tractVehicles from the factory vent these excess crankcase vapors, residual oil mist and moisture right back into the intake manifold which could cause detonation, oil deposits to form in the intake tract including the valves themselves and from lowering the ficiency of the intercooler in intercooler equipped vehicles
      $305.58 - $348.87
    • (0 reviews)
      # 111781676
      Subaru WRX 2011, Rear Catalytic Converter by Eastern®. Catalytic Series: ECO III. Converter Configuration: Direct Fit. Catalytic Converter Format: Main Catalytic Converter. Catalytic Converter Oxygen Sensor Location: Rear. CARB...
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $248.20
    • (0 reviews)
      # 100278279
      Subaru WRX 2011, Rear Catalytic Converter by Eastern®. Catalytic Series: ECO III. Converter Configuration: Universal Fit. Catalytic Converter Format: Main Catalytic Converter. Inlet Diameter: 2.25". Outlet Diameter: 2.25". CARB...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $71.48
    • (0 reviews)
      # 89622723
      Subaru WRX STI 2011, OIL Catch Tank by Cusco®. Volume: 0.4 L.
      $117.90
    • (0 reviews)
      # 98837084
      Subaru WRX / WRX STI Base 2011, Dual Catch Can Kit by Radium®. Includes: 2x Black Anodized and Laser Engraved Billet Aluminum Catch Cans, 4x Black Anodized -AN Aluminum Adapter Fittings, 4x Black Anodized 90 Degree -AN Hose Ends,...
      $427.45
    • (0 reviews)
      # 73694021
      Subaru WRX / WRX STI 2011, Air Oil Separator Kit by PERRIN Performance®. The PERRIN Performance Air Oil Separator traps oil from the crank case vents before it enters the intake, thus increasing intercooler efficiency and reduces...
      Increases intercooler efficiencyReduces carbon build up
      $382.50
    • (0 reviews)
      # 16852464
      Subaru WRX / WRX STI 2011, Engine Oil Separator Cover by Dorman®. Featuring a stamped steel design to improve upon the original, failure-prone plastic materials, Dorman’s Engine Oil Separator Cover provides a long-lasting service...
      Oil- and heat- resistantDirect replacement for a proper fit
      $23.33
    • (0 reviews)
      # 44711519
      Subaru WRX 2011, Driver Side Breather Hose by Genuine®. Location: Cylinder Head to P.C.V. Pipe. Do you hear a humming or growling sound as you drive, or a clicking or clunking noise when cornering? If so, your vehicle may need...
      OE quality parts from top original equipment and aftermarket manufacturersFast shipping; 1-2 day delivery time regardless of where you’re located
      $16.37
    • (0 reviews)
      # 18907543
      Subaru WRX 2458 CC 2011, EGR Valve 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...
      Direct OEM replacement for a proper fitEnsure reliable sealing performance
      $3.10
    • (0 reviews)
      # 97164442
      Subaru WRX STI 2011, Intermotor™ Secondary Air Injection Bypass Valve by Standard®. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive...
      OE quality parts from top original equipment and aftermarket manufacturersFast shipping; 1-2 day delivery time regardless of where you’re located
      $228.47
    • (0 reviews)
      # 97176815
      Subaru WRX 2011, Intermotor™ PCV Valve 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...
      OE quality parts from top original equipment and aftermarket manufacturersFast shipping; 1-2 day delivery time regardless of where you’re located
      $14.40 - $15.08
    • (0 reviews)
      # 93146583
      Subaru WRX 2011, Baffled Oil Catch Can by Mishimoto®. The Mishimoto Baffled Oil Catch Can is the most advanced oil catch can on the market. Every turbo system deserves to be complemented by a proper oil catch can setup, also known...
      40-micron bronze filter blocks oil from depositing in ventilation systemSpecial engineered inlet pattern "turbulates" air longer, allowing oil to condense
      $393.75 - $397.50
    • (0 reviews)
      # mpn358583092
      Universal, Air-Oil Separator PCV Delete Kit by Moroso®. With this quality part backed by a great price, you can enjoy your vehicle so much more than you thought was possible. This Moroso part is specifically engineered to make your...
      $98.86
    • (0 reviews)
      # mpn2059757184
      Universal Clamp On Dry Sump Breather Tank by JOES Racing®. Size: 1"-1/2". JOES Dry Sump Breather tank is designed to allow venting of your dry sump tank while catching any oil that blows out. It’s a compact 3" x 3" x 6.5" to fit...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $89.81
    • (0 reviews)
      # 100278342
      Universal Fit Catalytic Converter by Eastern®. Catalytic Series: ECO GM. Converter Configuration: Universal Fit. Catalytic Converter Format: Main Catalytic Converter. CARB Compliant: No. Catalytic Converter Body Length: 12"....
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $83.88 - $88.68
    • (0 reviews)
      # mpn2028122694
      Universal Fit Center Catalytic Converter by Eastern®. Catalytic Series: ECO III. Converter Configuration: Universal Fit. Catalytic Converter Format: Main Catalytic Converter. Catalytic Converter Oxygen Sensor Location: Center....
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $92.15
    • (0 reviews)
      # 100278495
      Universal Fit Catalytic Converter by Eastern®. Catalytic Series: ECO II. Converter Configuration: Universal Fit. Catalytic Converter Format: Main Catalytic Converter. CARB Compliant: No. Without Inlet Gasket. Without Outlet Gasket....
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $66.23 - $87.13
    • (0 reviews)
      # 120089818
      Universal Catalytic Converter by Bosal®. Converter Configuration: Universal Fit. If you’re in need of a replacement catalytic converter, you can’t do better than Bosal. They’re a leading supplier to vehicle manufacturers and...
      Constructed to meet your vehicle’s specific emissions requirementsRadial flow concept allows for an even distribution of the gas flow in the converter for the optimal conversion of harmful gases
      $70.91 - $71.91
    • (1 reviews)
      # 107662222
      Universal Clamp On Crankcase Vent Filter by K&N®. Designed utilizing the latest technology, this Crankcase Vent Filter by K&N 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
      $19.69 - $23.35
    • (1 reviews)
      # 107662290
      Universal Push On Crankcase Vent Filter by K&N®. Designed utilizing the latest technology, this Crankcase Vent Filter by K&N 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
      $9.42 - $92.99
    • (0 reviews)
      # mpn753352631
      Universal Crankcase Evacuation System by BTP®. Designed utilizing the latest technology, this product delivers the performance you've been looking for. With this second-to-none part by BTP you will keep emission control system in...
      Designed for better performance of your emission control systemRight for your vehicle and lifestyle
      $34.74
    • (1 reviews)
      # mpn753352945
      Universal Polished Aluminum PCV Valve by BTP®. 3/4" O.D. Neck. 3/8" Tube. Designed utilizing the latest technology, this product delivers the performance you've been looking for. With this second-to-none part by BTP you will keep...
      Designed for better performance of your emission control systemRight for your vehicle and lifestyle
      $20.07
    • (0 reviews)
      # 118615091
      Universal Oil Catch Can by Vibrant Performance®. Vibrant Performance offers the most versatile Universal Catch Cans on the market. Made entirely from T6061 Aluminum, it is suitable for various types of service: Oil, Fluid (i.e....
      Top End Cap is pressure fitEach End Cap also features a port tapped for 3/4” NPT fittings, perfect for running a breather filter off your Catch Can
      $102.38
    • (0 reviews)
      # 118569120
      Universal Round Straight Breather Air Filter by Spectre Performance®. Filter Material: Non-woven Synthetic. Top Material/Finish: Chrome. Rooted in racing, Spectre Performance designs and builds every product with the same goal in...
      High-tech engine parts for the most power and best performanceThe finest exterior and interior parts for superior appearance and functionality
      $10.86 - $18.25
    • (0 reviews)
      # 107150329
      Universal Magnum Flow Crank Case Ventilation Air Filter by aFe®. Filter Series: Pro Dry S. Keep your engine breathing properly and looking good with this crankcase vent breather filter.
      High Flow For Increased PerformanceWashable and reusable
      $25.95 - $46.95
    • (0 reviews)
      # 82368344
      Universal One Way Inline Pop Off Valve by Peterson Fluid Systems®. Breather assembly is installed in line from engine's crankcase. Valve seals engine from air entering engine, but opens in the event of crankcase pressure, allowing...
      Protects the pump in case of catastrophic engine failureMade of high quality Aluminum
      $123.83 - $128.15
    • (0 reviews)
      # mpn358504773
      Universal One Way Pop Off Valve by Peterson Fluid Systems®. With filter and -12 AN Weld Bung. Breather assembly is installed on engine's crankcase in vacuum condition. Valve seals engine from air entering engine, but opens in the...
      $115.19
    • (0 reviews)
      # 82368371
      Universal Remote Breather Can by Peterson Fluid Systems®. Peterson remote breather cans with internal baffeling are excellent when breathing your dry sump tank to atmosphere or running a vacuum system.
      Made of high quality AluminumInternally baffled
      $182.24 - $184.94
    • (0 reviews)
      # mpn358504774
      Universal Vacuum Regulator by Peterson Fluid Systems®. Peterson's new adjustable vacuum regulator is on the leading edge of engine management. It has been proven to regulate crankcase vacuum and hold a steady level through...
      Regulates crankcase vacuumMade of high quality billet Aluminum
      $194.39
    • (0 reviews)
      # 120885931
      Universal Clamp-On Round Straight Breather Filter by AIRAID®. Flange Length: 0.5" (13 mm). Height: 1.5" (38 mm). Quantity: Sold individually. Keep your engine breathing properly and looking good with these crankcase vent filters.
      Washable and reusableBacked by AIRAID's "No Hassle" warranty
      $20.30 - $27.44
    • (0 reviews)
      # 120885920
      Universal Push-On Oval Straight Breather Filter by AIRAID®. Filter Material: Non-woven Synthetic. Flange Length: 0.5" (13 mm). Height: 1.5" (38 mm). Outside Length: 4". Outside Width: 2" (51 mm). Quantity: Sold individually. Keep...
      Washable and reusableBacked by AIRAID's "No Hassle" warranty
      $20.30
    • (0 reviews)
      # 120885994
      Universal Push-On Round Straight Breather Filter by AIRAID®. Flange Inside Diameter: 1.25" (32 mm). Flange Length: 0.5" (13 mm). Height: 1.5" (38 mm). Quantity: Sold individually. Keep your engine breathing properly and looking...
      Washable and reusableBacked by AIRAID's "No Hassle" warranty
      $17.24 - $25.40
    • (0 reviews)
      # 120886015
      Universal Screw On Round Straight Breather Filter by AIRAID®. Flange Inside Diameter: 1.25" (32 mm). Flange Length: 0.5" (13 mm). Height: 1.5" (38 mm). Outside Diameter: 3" (76 mm). Quantity: Sold individually. Keep your engine...
      Washable and reusableBacked by AIRAID's "No Hassle" warranty
      $20.30 - $25.40
    • (1 reviews)
      # 2565187
      Universal Crankcase Air Filter by Green Filter®. Route your crankcase breather into one of these filters to keep dirt and bugs from entering your crankcase. It’s easy to clean, and will soak up some glop that otherwise would wind...
      Cotton element catches oily blow-bySteel mesh resists denting
      $16.79 - $20.99
    • (0 reviews)
      # 117988793
      Universal Engine Valve Cover Breather Filter by R2C Performance®. R2C Performance valve cover breather filters are designed to offer racers the finest crankcase and tank breather technology available today. R2C's breather flange...
      $30.04
    • (0 reviews)
      # 102569577
      Universal Catch Can Kit by Radium®. An oil catch can is essential on a performance vehicle to protect the engine from elevated levels of crankcase blow-by accumulated from aggressive driving. Excess oil saturated air circulating...
      $157.65 - $299.20
    • (0 reviews)
      # 102569584
      Universal Competition Catch Can by Radium®. The Radium Competition Catch Can (CCC) was created to provide motorsports participants with a high quality product that meets the common 1 Quart minimum capacity requirements dictated by...
      $332.45 - $379.95
    • (0 reviews)
      # 118614769
      Universal GESI® High Output Catalytic Converters by Vibrant Performance®. Vibrant Performance and Global Emissions Systems Inc. (GESi®) have teamed up to supply a series of OBD2 (1996 and newer) high flow Catalytic Converters...
      EPA certified for use on OBD2 vehicles (1996 and newer) in jurisdictionswhere the installation of Universal Catalytic Converters is still permitted
      $335.21 - $448.35
    • (0 reviews)
      # 118614780
      Universal High Output Catalytic Converters by Vibrant Performance®. Vibrant Performance Metal or Ceramic Core Catalytic Converters are made entirely of Stainless Steel and feature a Monolith that is far more durable and capable...
      T304 Stainless Steel ConstructionThese Converters are covered by a 5 year / 50,000 mile warranty
      $75.76 - $109.10
    • (0 reviews)
      # mpn739977875
      Universal High-Flow Catalytic Converter with Metallic Substrate Kit by Pypes®. CARB Compliant: 50 State Legal. Converter Configuration: Universal Fit. Includes: Metallic Substrate Kit. These Mini converters are 409 stainless for...
      409 stainlesss steel construction resists corrosionWith slots and 02 bung
      $141.99
    • (0 reviews)
      # 84198005
      Universal PowerCat Stainless Steel Catalytic Converter by Dynatech®. 1 Piece. The Dynatech PowerCAT catalytic convertor uses the latest technology in catalytic convertor design. Utilizing a Premium Metallic Substrate internal...
      Premium metallic substrateSuperior strength and durability
      $174.99
    • (1 reviews)
      # 82989181
      Universal Car Diesel Catalytic Converter by Thunderbolt®. 4" Round x 11" Long. These superior quality products are carefully engineered to improve exhaust flow and boost power of your vehicle. These Thunderbolt performance exhaust...
      Designed to improve exhaust flowBuilt to enhance the performance of your vehicle
      $79.39
    • (1 reviews)
      # 82989467
      Universal Oval Catalytic Converter by Thunderbolt®. These superior quality products are carefully engineered to improve exhaust flow and boost power of your vehicle. These Thunderbolt performance exhaust products also help your...
      Designed to improve exhaust flowBuilt to enhance the performance of your vehicle
      $39.69 - $76.06
    • (0 reviews)
      # 82989388
      Universal The Spun Formed Catalytic Converter by Thunderbolt®. These superior quality products are carefully engineered to improve exhaust flow and boost power of your vehicle. These Thunderbolt performance exhaust products also...
      Designed to improve exhaust flowBuilt to enhance the performance of your vehicle
      $44.46 - $76.22
    • (0 reviews)
      # 82989593
      Universal Truck Diesel Catalytic Converter by Thunderbolt®. 6" Round x 12" Long. These superior quality products are carefully engineered to improve exhaust flow and boost power of your vehicle. These Thunderbolt performance...
      Designed to improve exhaust flowBuilt to enhance the performance of your vehicle
      $183.83
    • (0 reviews)
      # 83115043
      Universal 304 SS High-Flow Catalytic Converter by Stainless Works®. CARB Compliant: No. This superior product is made from high-grade stainless steel to ensure excellent quality and maximum resistance to corrosion. Engineered with...
      Designed to meet strict quality standardsCarefully crafted from first-rate stainless steel
      $184.50
    • (0 reviews)
      # mpn458109083
      Universal J-Style Oxygen Sensor Restrictor Fitting by Vibrant Performance®. A standard O2 Sensor threads into the female end of this fitting. Insert one of the three included inserts to restrict exhaust gas flow to the O2 Sensor...
      $33.00
    • (0 reviews)
      # mpn358596199
      Universal Oxygen Sensor Restrictor Fitting by Vibrant Performance®. A standard O2 Sensor threads into the female end of this fitting. Insert one of the three included inserts to restrict exhaust gas flow to the O2 Sensor and retain...
      $20.95
    • (0 reviews)
      # mpn358501228
      Universal O2 Sensor Clamp by Innovate Motorsports®. Patent-pending, venturi-effect, tapped exhaust clamp for obtaining accurate lambda measurements in non-cat autos or other engines.
      $77.19
    • (0 reviews)
      # 98119345
      Universal O2 Sensor Extender by Torque Solution®. On ODB-II vehicles (96+), the ECU has two O2 sensors for diagnostic purposes. The first O2 sensor is located before the Catalytic Converter and is responsible for all the Air/Fuel...
      $29.21
    • (0 reviews)
      # mpn101740739
      Universal Composite Breather Tube by K&N®. Designed utilizing the latest technology, this Breather Tube by K&N features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $43.99
    • (0 reviews)
      # 118614545
      Universal Crankcase Breather Filter with Chrome Cap by Vibrant Performance®. Vibrant Performance These compact filters are perfect for use on engine bays where space is limited.
      Made of High Quality MaterialsAvailable in different sizes
      $7.30




    Guides & Articles

    • Replacement Emission Control Parts
      Oxygen Sensors - Why Does My Car Have Four, And Can I Replace One Myself?
      An oxygen sensor (also known as an O2 sensor or Lambda sensor) is a sensor designed to generate a reading based on the content of oxygen in an automotive exhaust system. The sensor itself is made of a ceramic compound with porous-shaped electrodes coated in platinum, surrounded by a protective metal shell casing. O2 sensor casings are threaded, and the entire unit is designed to screw in until it reaches a half-in, half-out position on the exhaust pipe. Modern oxygen sensors are heated to ensure they reach operating temperature quickly.
    • Ignition Parts
      Auto Parts: Dealer vs. Aftermarket
      The question of whether to buy parts from an automotive dealer vs. ones from aftermarket manufacturers is as age-old as the automobile itself. Below, we'll take a look at things worth considering to help you make a better choice if you're facing that same question. Automobile manufacturers and dealerships always advertise the fact that their parts are "genuine" because they were made by the exact same production facility that made the parts installed on the assembly line.

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    2011 Subaru WRX Emission Control Reviews

    Average rating:  4.5  4.5 - 2 reviews
    4.8 of 5
    Good Purchase
    Recently I have mounted new cat. My purchase has a faultless casing and everything measures up perfectly. That's nice deal for my Dodge, because the sound great. I like the tonality of these high flow catalytic if your looking for high flow cats these are the way to go.
    CPosted by Craig Walters (Louisbourg, NS) /
    Was this review helpful for you? Yes
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    2011 Subaru WRX Models
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