2004 Subaru Forester Performance Air Intake Systems

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    • K&N® 69 Series Typhoon Cold Air Intake System
      (0 reviews)
      # 324564
      Subaru Forester Turbocharged 2004, 69 Series Typhoon Cold Air Intake System by K&N®. Replacement Filter # RP-5113. Use with Pre-Filter # RU-5147DK. Air Filter Height: 5.625" (143 mm). Air Filter Large End Diameter: 6.5" (165 mm)....
      Guaranteed to increase horsepower and improve accelerationCustom designed and engineered for each application
      $314.99
    • AEM® Aluminum Cold Air Intake System
      (0 reviews)
      # 251828
      Subaru Forester Turbocharged 2004, Aluminum Cold Air Intake System by AEM®. Replacement Filter # 21-2038DK. Use with Pre-Filter # 1-4001. Tube Material: Aluminum. To deliver cooler air to the engine, this air intake system places...
      Delivers more oxygen to the combustion chamber by drawing in cooler airCustom designed and engineered to deliver maximum power for each specific vehicle
      $276.99 - $300.99
    • AEM® Aluminum Short Ram Air Intake System
      (0 reviews)
      # 254059
      Subaru Forester Turbocharged 2004, Aluminum Short Ram Air Intake System by AEM®. Replacement Filter # 21-202DK. Use with Pre-Filter # 1-4000. Includes: 4 Hose Clamps. Tube Material: Aluminum. Estimated Horsepower Gain: 11.77 HP @...
      Delivers increased performance for less costEasily installs under the hood
      $175.99 - $186.99
    • Weapon-R® Dragon Air Intake System (Polished Pipe, Gunmetal Filter Cage, Black Foam Filter)
      (0 reviews)
      # 100728722
      Subaru Forester 2004, Dragon Air Intake System by Weapon-R®. Pipe Finish: Polished. Filter Cage Finish: Gunmetal. Foam Filter Finish: Black. Weapon-R Intake Systems are CNC Mandrel Bent out of 6061 aluminum, and then Hand Tig...
      Custom designed and engineered for each applicationEach system is tuned to maximize engine performance output
      $177.65
    • Weapon-R® Secret Weapon Air Intake System (Polished Pipe, Gunmetal/Black Foam Filter)
      (3 reviews)
      # 285875
      Subaru Forester 2004, Secret Weapon Air Intake System by Weapon-R®. Pipe Finish: Polished. Foam Filter Finish: Gunmetal/Black. The Secret Weapon Air Intake System uses patented technology to feed the engine 3 times as much air as...
      Patented technology increases airflow 3 times more than conventional systemsEach system is tuned to maximize engine performance output
      $220.15
    • Weapon-R® Stealth Secret Weapon Air Intake System (Flat Black Pipe, Gunmetal/Black Foam Filter)
      (0 reviews)
      # 50030171
      Subaru Forester 2004, Stealth Secret Weapon Air Intake System by Weapon-R®. Pipe Finish: Flat Black. Foam Filter Finish: Gunmetal/Black. Cooler air inlet temperatures mean more horsepower. This simple to install kit makes it easy...
      Increased engine airflow for low costIncludes the revolutionary Secret Weapon Air filter
      $245.65
    • APEXi® Power Intake Kit
      (0 reviews)
      # 79118421
      Subaru Forester With SG5 Chassis With EJ20T Motor 2004, Power Intake Kit by APEXi®. The Power Intake is the premier air filter designed to create pure horsepower. The intake funnels used in racing machines take advantage of a...
      $177.31
    • AVO® Cold Air Box Kit
      (0 reviews)
      # 61627319
      Subaru Forester XT 2004, Cold Air Box Kit by AVO®.
      $155.00
    • PERRIN Performance® Short Ram Air Intake
      (0 reviews)
      # 73693330
      Subaru Forester Turbocharged 2004, Short Ram Air Intake by PERRIN Performance®. Increase horsepower and style under your hood. The PERRIN Performance intake system uses proper MAF alignment and plumbing size, which are crucial to...
      Precision CNC construction for perfect fitThroaty deep tone sound
      $199.80 - $226.80
    • K&N® 33 Series Panel Air Filter
      (1 reviews)
      # 321322
      Subaru Forester 2004, 33 Series Panel Air Filter by K&N®. Filter Material: Cotton Gauze. Includes: 1 Air Filter. K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent...
      Improves engine airflowIncreases horsepower and acceleration
      $49.99
    • AIRAID® SynthaMax Red Air Filter
      (1 reviews)
      # 80295725
      Subaru Forester Turbocharged 2004, SynthaMax Red Air Filter by AIRAID®. Advanced air filtration technology, superior construction and the world's best warranty make an AIRAID air filter the best you can buy. It allows increased...
      Improves airflow and engine performanceProvides superior air filtration and engine protection
      $62.11
    • aFe® Magnum Flow Pro 5R Panel Air Filter
      (1 reviews)
      # 919185
      Subaru Forester 2004, Magnum Flow Panel Air Filter by aFe®. Filter Series: Pro 5R. This Pro 5R air filter provides performance filtration and maximum convenience. Constructed with 100% polyurethane on all sides, this high flow...
      Deep Cotton Pleats for Increased FlowFits In Factory Housing
      $62.95
    • aFe® Magnum Flow Pro Dry S Panel Air Filter
      (0 reviews)
      # 922042
      Subaru Forester 2004, Magnum Flow Panel Air Filter by aFe®. Filter Series: Pro Dry S. Constructed with 100% polyurethane on all four sides, this high flow "oil-free" OE replacement performance filter will outflow stock paper filter...
      For Improved Horsepower And TorqueLimited Lifetime Warranty
      $73.95
    • APEXi® Power Intake Panel Filter
      (0 reviews)
      # 79118301
      Subaru Forester 2004, Power Intake Panel Filter by APEXi®. Some manufacturers of performance air filters make aggressive claims about their filter's ability to make power, but leave out the fact that their filters are not effective...
      $35.81
    • AVO® Hi-flow Panel Air Filter
      (0 reviews)
      # 61627318
      Subaru Forester XT 2004, Hi-flow Panel Air Filter by AVO®.
      $49.00
    • AVO® Power Air Filter Kit
      (0 reviews)
      # 62398091
      Subaru Forester XT 2004, Power Air Filter Kit by AVO®.
      $190.00
    • GREEN FILTER® Factory Replacement Air Filter
      (0 reviews)
      # 56295774
      Subaru Forester 2004, Factory Replacement Air Filter by GREEN FILTER®. Replace your factory air cleaner filter element with a Green Filter oiled-cotton filter and never buy another filter as long as you own your vehicle. Enjoy...
      Cleanable, reusable filter element will outlast your carTraps particles as small as 5 microns
      $48.35
    • Spectre Performance® Panel HPR™ OE Replacement Air Filter
      (1 reviews)
      # 49224886
      Subaru Forester Turbocharged 2004, Panel HPR™ OE Replacement Air Filter by Spectre Performance®. Spectre’s High Performance Replacement Air Filters are engineered to outperform ordinary paper filters by providing increased air...
      High-tech engine parts for the most power and best performanceThe finest exterior and interior parts for superior appearance and functionality
      $19.91
    • HKS® Super Hybrid Filter
      (0 reviews)
      # 70193960
      Subaru Forester Turbocharged With SG5 Chassis / With SG9 Chassis 2004, Super Hybrid Filter by HKS®. 3 layered filter divides, collects intake air and smoothes air flow. It enables quick response that is required for sport filter....
      With high strength double frame, strong frame can be used for high horsepower.Shape of re-designed top frame enables smooth air flow.
      $35.00
    • PERRIN Performance® 3.125" Foam Type Cone Filter
      (0 reviews)
      # 84938413
      Subaru Forester Turbocharged 2004, 3.125" Foam Type Cone Filter by PERRIN Performance®. This is a direct replacement for most PERRIN Performance intake systems including the Big MAF intakes. PERRIN Performance filters feature a...
      Two-piece design for easy cleaningOpen cell foam element
      $62.10
    • PERRIN Performance® Panel Air Filter
      (0 reviews)
      # 74187509
      Subaru Forester Turbocharged 2004, Panel Air Filter by PERRIN Performance®. Don’t let a restrictive OEM paper filter get between you and true performance. The PERRIN Performance™ drop-in Panel Filter is the answer for more...
      Open cell foam elementCleaner for efficient and trouble-free cleanup
      $43.20
    • JET® Powr-Flo™ Mass Air Flow Sensor
      (0 reviews)
      # 41033949
      Subaru Forester 2004, Powr-Flo™ Mass Air Flow Sensor by JET®. JET Powr-Flo Mass Airflow Sensors will increase your engine's horsepower, low-end torque, and mileage by replacing the restrictive stock MAF sensor which limits your...
      Increase Horsepower And Low End TorqueImproved Mileage
      $152.21
    • Spectra Premium® Mass Air Flow Sensor
      (0 reviews)
      # 57164929
      Subaru Forester 2004, Mass Air Flow Sensor by Spectra Premium®. Includes Sensor only. This is an aftermarket part that replaces factory OE # 22680AA310. Spectra Premium’s complete line of new Mass Air Flow Sensors, featuring...
      Provide more consistent voltage to eliminate engine rough idle problemsPlatinum connector threads reduce the number of connection points for faster reaction to change
      $87.70
    • Mishimoto® Silicone Induction Hose
      (1 reviews)
      # 80951018
      Subaru Forester XT 2004, Silicone Intakes by Mishimoto®. The Mishimoto Silicone Intake Boot is made from a combination of high-grade silicone and heat-resistant embedded fibers for a high-quality replacement kit for your OEM rubber...
      Direct OEM fitManufactured from 100% high-grade silicone and heat-resistant embedded fibers
      $189.00 - $201.00
    • PERRIN Performance® Turbo Inlet Hose
      (0 reviews)
      # 73693349
      Subaru Forester Turbocharged 2004, Turbo Inlet Hose by PERRIN Performance®. Silicone technology allows us to design a turbo inlet hose that is better in all aspects than the OEM part and increases your engines horsepower and...
      Designed to provide increased air flowSS internal support wire for added rigidity and collapse prevention
      $238.50 - $250.20
    • Spectre Performance® 3" Airflow Sensor Mount
      (1 reviews)
      # 12036593
      Subaru Forester 2004, 3" Airflow Sensor Mount by Spectre Performance®. Rooted in racing, Spectre Performance designs and builds every product with the same goal in mind - the best performance in the market proven on the racetrack!...
      High-tech engine parts for the most power and best performanceThe finest exterior and interior parts for superior appearance and functionality
      $9.96
    • Torque Solution® MAF Block-off Plate
      (0 reviews)
      # 98119304
      Subaru Forester XT 2004, MAF Block-off Plate by Torque Solution®. Torque Solution Maf Block Off plates were designed to seal off the intake system. This makes for an easy transition to Speed Density tuning once plugged up....
      $43.38
    • Torque Solution® Throttle Body Spacer
      (0 reviews)
      # 98119666
      Subaru Forester XT 2004, Throttle Body Spacer by Torque Solution®. Throttle Body Spacers are designed to increase Horsepower & Torque. By creating more intake manifold volume along with a better air fuel mixture you will make more...
      $75.93
    • Torque Solution® Thermal Intake Manifold Gaskets
      (0 reviews)
      # 61627378
      Subaru Forester XT 2004, Thermal Intake Manifold Gaskets by Torque Solution®. Thermal Intake Manifold Gaskets use a proprietary gasket material that lowers intake temps by reducing heat transfer from the head to the intake...
      $43.38
    • Beck Arnley® Air Filter
      (0 reviews)
      # 35860334
      Subaru Forester 2004, Air Filter by Beck Arnley®. Primary. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import vehicles in...
      It is recommended to use factory hardware for installationOE quality products from top original equipment
      $9.65 - $12.78
    • Bosch® Air Filter
      (0 reviews)
      # 78097865
      Subaru Forester EJ255 Engine 2004, Air Filter by Bosch®. Dirty air filters can cause decreased fuel mileage, increased engine wear, and even problems starting the engine. Check your engine air filter at every oil change and always...
      Protects Your Engine by Stopping 98% of Engine-Threatening ParticlesPrevention of Unfiltered Air Entering Engine Intake with a High-Quality Seal
      $10.39 - $14.76
    • Denso® Air Filter
      (0 reviews)
      # 85824763
      Subaru Forester 2004, Air Filter, FTF Air Filter by Denso®. The air filter is the last line of defense against the harmful airborne abrasives that have been proven to wear out engines before their time. With OE-quality engineering...
      High airflow rate improves performance and fuel economySuperior dust holding capacity increases filter life
      $8.60 - $10.12
    • FRAM® Extra Guard™ Flexible Panel Air Filter
      (0 reviews)
      # 83785046
      Subaru Forester 2004, Extra Guard™ Flexible Panel Air Filter by FRAM®. Most dirt and dust enters the engine through the air filter and FRAM Extra Guard is engineered to provide twice the air filtration compared to an original...
      Provides better air filtration for improved performancePrevents damaging particles from entering your engine
      $9.13 - $9.24
    • FRAM® Tough Guard™ Air Filter
      (0 reviews)
      # 18682477
      Subaru Forester Turbocharged 2004, Tough Guard™ Air Filter by FRAM®. Size: 11.11" (L) x 6.56" (W) x 1.28" (H). This premium air filter is engineered to meet extreme driving conditions. It features a pre-oiled filter media for...
      Provides superior air filtration under any driving conditionsPre-oiled media
      $12.86
    • Full® Air Filter
      (0 reviews)
      # 8021696
      Subaru Forester 2004, Air Filter by Full®. If you have a dirty air filter, clogged PCV valve, or defective MAF sensor you may be tempted to just run down to the local auto parts chain store for a replacement, but before you waste...
      OE quality parts from top original equipment and aftermarket manufacturersFast shipping; 1-2 day delivery time regardless of where you’re located
      $10.17 - $15.31
    • Hastings® Air Filter
      (0 reviews)
      # 21498277
      Subaru Forester 2004, Air Filter by Hastings®. Clean air is critical to the performance of your engine, so don’t trust just any filter. Hastings filters are tested according to SAE J726 test procedures, where they meet or exceed...
      Filters out dirt and dust in the air preventing them from entering the engineHeavy duty construction for long service life
      $12.49 - $13.13
    • Motorcraft® Air Filter
      (0 reviews)
      # 23869712
      Subaru Forester 2004, Air Filter by Motorcraft®. The air filter is a simple yet crucial part of your vehicle that keeps dust and road debris out of the engine. If the air filter is clogged up and starts to choke off the airflow to...
      Direct OEM replacement for proper fitRecommended by Ford Motor Company
      $9.05
    • NPN® Air Filter
      (0 reviews)
      # 8726038
      Subaru Forester 2004, Air Filter by NPN®. If you have a dirty air filter, clogged PCV valve, or defective MAF sensor you may be tempted to just run down to the local auto parts chain store for a replacement, but before you waste...
      OE quality parts from top original equipment and aftermarket manufacturersFast shipping; 1-2 day delivery time regardless of where you’re located
      $7.30
    • Purolator® Air Filter
      (0 reviews)
      # 7806451
      Subaru Forester 2004, Air Filter by Purolator®. If you have a dirty air filter, clogged PCV valve, or defective MAF sensor you may be tempted to just run down to the local auto parts chain store for a replacement, but before you...
      OE quality parts from top original equipment and aftermarket manufacturersFast shipping; 1-2 day delivery time regardless of where you’re located
      $12.13
    • WIX® Air Filter Panel
      (0 reviews)
      # 64447216
      Subaru Forester US-Built 2004, Air Filter Panel by WIX®. Inner Diameter Top: Closed. Style: Air Filter Panel. Considering as much as 10,000 gallons of air must pass through the air filter for every gallon of fuel the engine...
      Prevents foreign particles like carbon, soot and abrasives from entering the fuel mixEnsures superior engine protection
      $11.39 - $13.01
    • A1 Cardone® Remanufactured Mass Air Flow Sensor
      (0 reviews)
      # 35535184
      Subaru Forester 2004, Remanufactured Mass Air Flow Sensor by A1 Cardone®. Mass Air Flow Sensor. Import. Without Housing. With Instruction Sheet. Mounting Holes: 2. Mounting Type: Bolt-On. This is an aftermarket part that replaces...
      50-state emissions street legalThe finest quality at a great price
      $67.15
    • Delphi® Mass Air Flow Sensor
      (0 reviews)
      # 24559383
      Subaru Forester 2004, Mass Air Flow Sensor by Delphi®. When it comes to MAF sensors, communication with the ECM is key. That’s why Delphi MAF sensors use all new parts - never remanufactured parts that could harbor debris and...
      Extensive coverageAvailable in a variety of bore diameters to accommodate a wide range of airflow, resulting in a robust design for electrical overloads
      $111.54
    • Genuine® Idle Control Valve
      (0 reviews)
      # 8774943
      Subaru Forester 2004, Idle Control Valve by Genuine®. 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 repair, but before you...
      OE quality parts from top original equipment and aftermarket manufacturersFast shipping; 1-2 day delivery time regardless of where you’re located
      $372.60
    • Beck Arnley® Cabin Air Filter
      (0 reviews)
      # 35813274
      Subaru Forester 2004, Cabin Air Filter by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import vehicles in...
      OE quality products from top original equipmentTop quality materials
      $28.78
    • Denso® Cabin Air Filter
      (0 reviews)
      # 21069678
      Subaru Forester 2004, Cabin Air Filter, Particulate Type by Denso®. O.E. recommended replacement filter. Premium electrostatically charged media. Captures ultra-fine particulates such as diesel carbon and smoke. For people with...
      Filter designed to trap contaminants before they enter the vehicle cabinPremium-quality filter media stops particulates down to 0.001 microns
      $29.64
    • FRAM® Fresh Breeze™ Cabin Air Filter
      (0 reviews)
      # 18686558
      Subaru Forester 2004, Fresh Breeze™ Cabin Air Filter by FRAM®. Size: 8.71" (L) x 7.92" (W) x 1.58" (H). The Fresh Breeze is engineered to filter and deodorize airflow drawn into the vehicle through the A/C, heating, and...
      Filters up to 98% of road dust and road pollenRemoves the reoccurring musty smell that can develop in air conditioning and heating systems
      $39.93
    • Hastings® Cabin Air Filter
      (0 reviews)
      # 21459067
      Subaru Forester 2004, Cabin Air Filter by Hastings®, Without Plastic Frame. This filter is specially designed and manufactured to reduce the amount of airborne pollutants and particles entering the cabin by capturing dust, pollen...
      Fully meets OE requirements for fit and operationReduces the level of contaminants, pollen, and dust in the cabin
      $18.68
    • NPN® Cabin Air Filter
      (0 reviews)
      # 84192543
      Subaru Forester 2004, Cabin Air Filter by NPN®. Are you shivering behind the wheel in the winter, or sweating in traffic in the summer? Do you detect the sweet smell of antifreeze in the cabin or see green liquid on the floor? Your...
      $33.29
    • WIX® Cabin Air Panel
      (0 reviews)
      # 64379368
      Subaru Forester US-Built 2004, Cabin Air Panel by WIX®. Height: 1.574". Inner Diameter Top: Closed. Length: 8.681". MediaType: Particulate. Style: Cabin Air Panel. WIX cabin air filters capture airborne contaminants like dirt,...
      Provides premium cabin air filtrationPrevents leaves, bugs, dirt, and other debris from entering your vehicle's HVAC system
      $29.26
    • ATP® Premium Line Cabin Air Filter
      (0 reviews)
      # 23421212
      Subaru Forester 2004, Premium Line Cabin Air Filter by ATP®. The cabin filter is designed and manufactured to reduce the amount of airborne pollutants and particles entering the cabin. This product by ATP is what you need to ensure...
      Fully meets OE requirements for fit and operationDirect replacement for a proper fit
      $14.51 - $22.73
    • TYC® Cabin Air Filter
      (0 reviews)
      # 12027143
      Subaru Forester 2004, Cabin Air Filter by TYC®. 1 Piece, Particulate Filter. As soon as your cabin air filter clogs or gets damaged, you notice it right away. And now you don't have to go to the dealer and pay twice the price to...
      OE quality at an affordable priceDirect replacement
      $14.20
    • Standard® Tru-Tech™ Engine Coolant Temperature Sensor
      (0 reviews)
      # 23781847
      Subaru Forester 2004, Tru-Tech™ Engine Coolant Temperature Sensor by Standard®. 3 Terminals Connector. When you’re low on oil, coolant or some other fluid, you may be tempted to just run down to the local auto parts chain...
      OE quality fluids from top original equipment and aftermarket manufacturersFast shipping; 1-2 day delivery time regardless of where you’re located
      $18.82
    • Denso® Mass Air Flow Sensor
      (0 reviews)
      # 21071397
      Subaru Forester 2004, Mass Air Flow Sensor by Denso®. The air filter is the last line of defense against the harmful airborne abrasives that have been proven to wear out engines before their time. With OE-quality engineering and...
      Glass film coated sensing elements reduces contamination and improves reliabilityPlatinum wire sensing element responds quickly to changes in air flow
      $118.39
    • Genuine® Air Mass Meter Boot
      (0 reviews)
      # 44711405
      Subaru Forester Turbocharged 2004, Air Mass Meter Boot by Genuine®. Location: To Air Cleaner. If you have a dirty air filter, clogged PCV valve, or defective MAF sensor you may be tempted to just run down to the local auto parts...
      OE quality parts from top original equipment and aftermarket manufacturersFast shipping; 1-2 day delivery time regardless of where you’re located
      $75.52
    • Beck Arnley® Intake Manifold Gasket Set
      (0 reviews)
      # 35860366
      Subaru Forester 2004, Intake Manifold Gasket Set by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import...
      OE quality products from top original equipmentTop quality materials
      $6.65 - $23.25
    • Victor Reinz® Intake Manifold Gasket Set
      (0 reviews)
      # 24047032
      Subaru Forester X / XS 2004, Intake Manifold Gasket Set by Victor Reinz®, Use 1 per Car. OEM Standard Part. Material: Nitroseal. Not Included: Plenum Gasket. This is an aftermarket part that replaces factory OE # MS96106, 14035...
      OE quality fluids from top original equipment and aftermarket manufacturersFast shipping; 1-2 day delivery time regardless of where you’re located
      $9.10
    • DNJ Engine Components® Intake Manifold Gasket Set
      (0 reviews)
      # 81855342
      Subaru Forester Naturally Aspirated 2004 Intake 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...
      Designed to restore your vehicle's original performanceProvides superior sealing performance
      $9.19
    • Fel-Pro® Intake Manifold Gasket Set
      (0 reviews)
      # 18982954
      Subaru Forester 2004, Intake 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
      $9.86 - $54.32
    • Nippon Reinz® Intake Manifold Gasket
      (0 reviews)
      # 8721017
      Subaru Forester 2004, Intake Manifold Gasket by Nippon Reinz®. To Cylinder Head. 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...
      $5.74 - $7.61
    • AJUSA® Intake Manifold Gasket
      (0 reviews)
      # 97663764
      Subaru Forester Naturally Aspirated 2004, Intake Manifold Gasket by AJUSA®. Gasket Material:ACM. These gaskets seal components in the intake and exhaust systems of the vehicle such as the intake manifold, intake plenum, and exhaust...
      Direct OEM replacement for a proper fitEnsure reliable sealing performance
      $3.62




    Guides & Articles

    • Performance Air Intake Systems
      Can an Air Intake System also Increase My Fuel Economy?
      We all know that achieving better fuel economy while driving puts money back in your pocket and does the environment a favor. But for those who are actively interested in squeezing the most out of every drop of gas, getting more miles per gallon can actually become a sport - especially if a vehicle has a manual transmission that can be upshifted earlier and put into neutral during downhill grades or when coasting to a stop sign.
    • Performance Air Intake Systems
      The Real Cost of Your Car’s Cheap Factory Air Filter
      In today's world, saving money wherever possible has become essential. But it's important not to lose sight of the fact that, sometimes, a product that costs more up front will save you more money over time. In our business, we've seen far too many consumers judge products solely on the basis of their initial cost, completely neglecting any long-term economy and benefits. When it comes to automobiles, "performance" air filters are a perfect example of this.
    • Performance Air Intake Systems
      My Car is Brand New | Why Should I Change My Air Intake System?
      Aftermarket air intake systems have become one of the most popular engine modifications available for late model cars and trucks. An easy question to ask is why are these so popular? After all, didn't engineers who work for your vehicle manufacturer spend years developing the best engine components available? Since power and fuel economy are major selling points these days, it's hard to imagine car companies not doing everything they can to maximize horsepower, miles per gallon, or both.
    • Performance Air Intake Systems
      What are the Different Types of Air Intake Systems?
      There are many types of aftermarket air intake systems that range from simple and inexpensive to elaborate. In the scope of this article, we'll examine the different types of air intakes, what they do, and look at a few specific product examples of each. But in short, performance air intake setups increase airflow into your engine - boosting combustion and creating more horsepower and torque that you can actually feel. Their relatively low cost and easy installation (bolt-on in most cases) keeps them in popular demand by car enthusiasts that own everything from 1.5-liter turbo motors to big block V8 engines.
    • Replacement Air Intake Parts
      Why Does My Car Have a Plastic Intake Manifold?
      An intake manifold is an integrated assembly that sits atop the engine, consisting of a series of tubes which distribute fresh outside air to each and every cylinder. On V-shaped engine blocks, an intake manifold typically sits between the two cylinder banks while inline engines may feature a manifold to the side of the cylinder head. Intake manifolds serve as a mounting point for carburetors, throttle body assemblies, fuel injectors, thermostats, and more depending on vehicle manufacturer engineering preferences. Intake manifolds may also serve to route coolant through dedicated channels in order to remove heat from the engine. Because of their location and functionality, intake manifold assemblies are under constant stress from engine vacuum pressure as well as direct heat from coolant, cylinder combustion gasses, and the cylinder heads to which they are mounted.

    Popular Products

    2004 Forester Performance Air Intake Systems Reviews

    Average rating:  4  4 - 1 review
    4 of 5
    Sound
    Installation instructions a bit off for my model. But once installed, it sounds great and looks good.
    MPosted by Matt (Quaker Hill, CT) /
    2003 Subaru Forester
    Was this review helpful for you? Yes
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