2009 Subaru WRX Emission Control

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    • (0 reviews)
      # 35994408
      Subaru WRX STI 2458 CC 2009, 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...
      Up to 15 % savings in fuel costsReduced CO2 emissions
      $61.60 - $135.78
    • (0 reviews)
      # 81756146
      Subaru WRX STI 2458 CC 2009, Rear Rear Oxygen Sensor by Delphi®. Connector Type: Square-4 Blade. Wrench Size: 7/8". Overall Length: 700 mm. As one of the leading suppliers of oxygen sensor technology since 1978, Delphi planar...
      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
      $59.64
    • (0 reviews)
      # 21071902
      Subaru WRX STI 2458 CC 2009, Downstream OE Connector Oxygen Sensor by Denso®. Heated. Screw Type. 4 Wires, 21.26" / 54.00 cm Length. Denso's light duty oxygen sensor started to appear on vehicles with the development of fuel...
      Corrosion-resistant stainless steel constructionPTFE filter blocks efficiency-robbing contaminants
      $56.94
    • (0 reviews)
      # 21104220
      Subaru WRX STI 2458 CC 2009, Upstream OE Connector Air Fuel Ratio Sensor by Denso®. 4 Wires, 31.06" Length. The air/fuel ratio sensor sends information to the engine management computer to makes adjustments based on driving...
      Tarnish-proof platinum electrodes provides longer life and maintains accuracyQuick-response planar zircon element can quickly detect oxygen concentration
      $123.76
    • (0 reviews)
      # 22131744
      Subaru WRX STI 2458 CC 2009, Downstream Oxygen Sensor by NTK®. Location: B1S2. OE Equivalent This product is designed to improve engine efficiency and fuel mileage, while reducing emissions and extending catalyst life. The oxygen...
      Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement
      $72.33
    • (0 reviews)
      # 8801306
      Subaru WRX STI EJ257 Engine 2009, 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...
      $24.05
    • (0 reviews)
      # 85013483
      Subaru WRX 2009, 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)
      # 172053885
      Subaru WRX 2458 CC 2009, Direct Fit Catalytic Converter by Eastern®. Outlet A: 2 Bolt Welded. If you need to replace your failed or damaged catalytic converter, this product is the right choice. Designed specifically for your...
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $254.36 - $254.70
    • (0 reviews)
      # 100278279
      Subaru WRX / WRX STI 2458 CC 2009, ECO III Universal Fit Rear Undercar Oval Catalytic Converter by Eastern®. Inlet A: 2.25". Outlet A: 2.25". Overall Length: 12". Converter Body Length: 8". Whether your catalytic converter is...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $71.48
    • (0 reviews)
      # 165400142
      Subaru WRX STI 2.5L 2009, Front Stainless Steel Direct Fit Catalytic Converter by AP Exhaust®. Location: Front. Catalytic Converter Substrate Material: Ceramic. Converter Body Material: Stainless Steel. Catalytic Converter Overall...
      Manufactured from high quality materialsDesign meet needs of OBDII equipped vehicles
      $258.76
    • (0 reviews)
      # 89622723
      Subaru WRX STI 2009, OIL Catch Tank by Cusco®. Volume: 0.4 L.
      $117.90
    • (0 reviews)
      # 98837084
      Subaru WRX / WRX STI Base 2009, 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,...
      Effectively raises the octane and increases engine performance with cleaner inlet airPrevents oil buildup in the intake or intercooler system walls, throttle body, intake manifold, etc.
      $427.45
    • (0 reviews)
      # 61628691
      Subaru WRX 2009, 3" Stainless Steel Downpipe with Catalytic Converter by AVO®. This AVO product is just the option for you in case you want to get the most out of your auto. It is made from first-rate materials to provide the...
      Designed to boost your vehicle's performanceMade from high-quality materials
      $690.00
    • (0 reviews)
      # 61590412
      Subaru WRX Base 2009, Direct Fit Federal OEM Grade Catalytic Converter by MagnaFlow®. Catalytic Series: OEM Grade. Catalytic Converter Substrate Material: Ceramic. Converter Body Material: Stainless Steel. CARB Compliant: No....
      Reduces harmful emissionsIncreases exhaust flow compared to original factory converter
      $457.42 - $529.02
    • (0 reviews)
      # 22197966
      Subaru WRX Base 2009, Direct Fit Federal Standard Front Catalytic Converter by MagnaFlow®. Catalytic Series: Standard. Catalytic Converter Substrate Material: Ceramic. Converter Body Material: Stainless Steel. Location: Front. CARB...
      Converter body manufactured from heavy-duty stainless steelIncreases exhaust flow compared to original factory converter
      $470.17
    • (0 reviews)
      # 73693888
      Subaru WRX / WRX STI 2009, 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)
      # 8806395
      Subaru WRX / WRX STI 2009, Crankcase O-Ring by Genuine®. Aluminium Washer For The Large Plugs On Crankcase. Is your CHECK ENGINE light on? Has your vehicle failed a state emissions test? Your vehicle’s emissions control system is...
      OE quality parts from top original equipment and aftermarket manufacturersFast shipping; 1-2 day delivery time regardless of where you’re located
      $3.24
    • (0 reviews)
      # 44711519
      Subaru WRX Base 2009, 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
      $16.64
    • (0 reviews)
      # 97164442
      Subaru WRX STI 2009, 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
      $240.63
    • (0 reviews)
      # 93146437
      Subaru WRX 2.5L 2009, 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...
      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...
      Kit allows Air/Separators to work at greater efficiency at all rpm levelsEnables full filtration of Blow By gases entering turbo inlet
      $117.75
    • (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
      $89.83
    • (1 review)
      # 139379692
      Universal Bullet Catalytic Converters by Eastern®. Whether your catalytic converter is damaged by road debris or failed due to an engine problem, you definitely need a new one, and this product is the way to go. Made of stainless...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $66.16 - $100.28
    • (0 reviews)
      # 139379691
      Universal Eco GM Round Catalytic Converter by Eastern®. Overall Length: 16". Converter Body Length: 12". Keep your exhaust emissions within specifications and your vehicle running in top condition with this quality product. Made of...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $83.88 - $88.78
    • (0 reviews)
      # 172044678
      Universal Large Oval Catalytic Converter by Eastern®. Overall Length: 16". Converter Body Length: 12". Keep your exhaust emissions within specifications and your vehicle running in top condition with this quality product. Made of...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $72.25 - $117.90
    • (0 reviews)
      # 139371691
      Universal Large Oval Dual Inlet Catalytic Converter by Eastern®. Outlet A: 2". Keep your exhaust emissions within specifications and your vehicle running in top condition with this quality product. Made of stainless steel, the...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $70.86 - $143.46
    • (0 reviews)
      # 172044684
      Universal Large Oval Single Inlet Catalytic Converter by Eastern®. Keep your exhaust emissions within specifications and your vehicle running in top condition with this quality product. Made of stainless steel, the catalytic...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $83.94 - $100.94
    • (0 reviews)
      # 139371686
      Universal Oval Body Catalytic Converter by Eastern®. Keep your exhaust emissions within specifications and your vehicle running in top condition with this quality product. Made of stainless steel, the catalytic converter is...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $45.48 - $108.03
    • (0 reviews)
      # 139371692
      Universal QuieCat™ Oval Resonated Converter by Eastern®. Overall Length: 18". Converter Body Length: 14". The new Eastern Catalytic QuietCat™ converter is specifically designed to meet the demand for quieter operation on full...
      Baffled tube reduces sound levels by 35% without losing horsepowerHigh flow design retains maximum engine output and maximizes catalytic efficiency
      $61.60 - $109.69
    • (0 reviews)
      # 139371685
      Universal Round Body Catalytic Converter by Eastern®. Keep your exhaust emissions within specifications and your vehicle running in top condition with this quality product. Made of stainless steel, the catalytic converter is...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $42.50 - $89.96
    • (0 reviews)
      # 172044711
      Universal Stuffed Tube Catalytic Converter with EndCap by Eastern®. Keep your exhaust emissions within specifications and your vehicle running in top condition with this quality product. Made of stainless steel, the catalytic...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $49.63 - $80.91
    • (0 reviews)
      # 139371684
      Universal Universal Fit Catalytic Converter by Eastern®. Whether your catalytic converter is damaged by road debris or failed due to an engine problem, you definitely need a new one, and this product is the way to go. Made of...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $55.42 - $84.21
    • (0 reviews)
      # 182090567
      Universal Catalytic Converter by Bosal®. Converter Configuration: Direct Fit. CARB Compliant: No. If you’re in need of a replacement catalytic converter, you can’t do better than Bosal. They’re a leading supplier to vehicle...
      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
      $53.39 - $112.81
    • (0 reviews)
      # 174563966
      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
    • (0 reviews)
      # 107663259
      Universal Oxygen Sensor by K&N®. Protect your expensive racing engine and keep it running at peak performance with these Fuel Injection Line Air Filters. They’ll keep the injector nozzle aeration holes from ingesting dirt or...
      $13.93 - $90.99
    • (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.
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $67.23
    • (0 reviews)
      # mpn1589831653
      Harness by Fast®. Includes Wide-Band Sensor and Harness to convert a a Single Sensor Wideband Unit to a Dual Sensor Unit. Also includes weld in O2 bung and a plug for it.
      High quality at an affordable priceExpertly made from premium materials
      $133.16
    • (7 reviews)
      # 152045176
      Universal Aluminum Oil Catch Tank by Weapon-R®. Whether you’re going racing or just want to look like you are, this aluminum tank will dress up your engine compartment.
      Manufactured from Billet 6061 AluminumBillet Aluminum machined fittings
      $59.50 - $128.00
    • (7 reviews)
      # 152045214
      Universal Neo-Ti Aluminum Oil Catch Tank by Weapon-R®. Whether you’re going racing or just want to look like you are, this Neo-Titanium Finish aluminum tank will dress up your engine compartment.
      Manufactured from Billet 6061 AluminumBillet Aluminum machined fittings
      $89.25
    • (1 review)
      # 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 review)
      # 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 review)
      # 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 - $149.95
    • (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)
      # 118569184
      Universal Clamp-On Style Mini Breather Filter by Spectre Performance®. Flange Inside Diameter: 0.375" (10 mm). Flange Length: 0.75" (19 mm). Height: 1.75" (44 mm). Outside Diameter: 2" (51 mm). Top Material/Finish: Chrome. Top...
      High-tech engine parts for the most power and best performanceThe finest exterior and interior parts for superior appearance and functionality
      $9.80 - $13.73
    • (1 review)
      # 107150329
      Universal Magnum Flow Pro Dry S Crank Case Ventilation Air Filter by aFe®. 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)
      # mpn358504772
      Universal Direct Screw-In Breather by Peterson Fluid Systems®. 12 AN male thread to screw directly into the breather bung on Peterson Dry Sump Tanks. Can also be used on engine valve covers as a fill plug/breather, when a -12 AN...
      High quality at an affordable priceExpertly made from premium materials
      $66.24
    • (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...
      High quality at an affordable priceExpertly made from premium materials
      $107.49 - $111.24
    • (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...
      High quality at an affordable priceExpertly made from premium materials
      $99.99
    • (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.
      High quality at an affordable priceExpertly made from premium materials
      $159.29 - $161.65
    • (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...
      High quality at an affordable priceExpertly made from premium materials
      $169.91
    • (5 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
    • (5 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
    • (5 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
    • (5 reviews)
      # 120886015
      Universal Screw-On Round Straight Breather Filter by AIRAID®. Filter Material: Non-woven Synthetic. Flange Inside Diameter: 1.25" (32 mm). Flange Length: 0.5" (13 mm). Height: 1.5" (38 mm). Outside Diameter: 3" (76 mm). Quantity:...
      Washable and reusableBacked by AIRAID's "No Hassle" warranty
      $20.30 - $25.40
    • (1 review)
      # 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...
      Longer Service LifeImproved Crankcase Ventilation
      $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...
      Effectively raises the octane and increased engine performance from cleaner inlet airPrevents oil buildup in the intake or intercooler system walls, throttle body, intake manifold, etc.
      $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...
      High quality at an affordable priceExpertly made from premium materials
      $332.45 - $379.95




    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.

    Popular Products

    2009 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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    2009 Subaru WRX Models
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