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The factory airbox on the 2002-2007 Subaru WRX (GD/GG chassis) is a restrictive plastic housing with a narrow-diameter snorkel and a corrugated rubber inlet hose that limits airflow before it even reaches your turbo. For the EJ205 (2.0L) and EJ255 (2.5L) turbocharged boxer engines, that means delayed spool, muted turbo sound, and throttle response that feels soft off-boost — exactly the opposite of what makes a WRX fun to drive.
This cold air intake kit replaces the entire factory system with a 3.0-inch mandrel-bent aluminum intake tube finished in a durable black powder-coated finish. The oversized dry cone filter mounts low in the fender well behind the passenger-side headlight, pulling cooler, denser air from outside the engine bay. A complete set of silicone couplers, stainless steel T-bolt clamps, and vehicle-specific mounting brackets is included — no cutting, no drilling, and no additional parts required.
On a stock-tune WRX, expect gains of 8-15 WHP and 8-12 lb-ft of torque, with the biggest difference being a noticeably faster turbo spool and sharper throttle tip-in. The sound transformation is dramatic: you'll hear the turbo spool whistle through the intake, a crisp bypass valve release on lift-off, and a deeper, more aggressive induction note under boost. Installation takes 60-90 minutes with basic hand tools and does not permanently modify any factory components.
Key Features
3.0" Mandrel-Bent Aluminum Intake Tube — Black powder-coated finish for heat resistance, corrosion protection, and a clean engine bay appearance. Smooth internal walls eliminate turbulence caused by the factory-corrugated rubber inlet.
High-Flow Dry Cone Filter — Large surface area conical filter, washable and reusable. Dry media requires no oiling, eliminating any risk of MAF sensor contamination — a common and expensive problem with oiled filters on turbo Subaru engines.
True Cold Air Intake Routing — Filter mounts in the passenger-side fender well, isolating it from engine bay heat. Colder intake air means denser oxygen charge, which directly translates to more power and lower risk of knock on a turbocharged engine.
Complete Bolt-On Kit — Includes all required silicone couplers, stainless steel T-bolt clamps, MAF adapter plate, breather hose, and vehicle-specific mounting brackets. Reuses your factory MAF sensor and air temperature sensor — simply unbolt and transfer.
Turbo Spool & Throttle Response — By removing the restrictive factory snorkel and airbox, the turbocharger can draw air with significantly less resistance. Expect improved spool characteristics, especially noticeable in 2nd-4th gear pulls.
Aggressive Induction Sound — Expect a pronounced turbo spool whistle, sharper bypass valve (BOV) venting, and a deeper intake growl under boost. For many WRX owners, the sound alone justifies the upgrade.
Direct Fit — No Permanent Mods — Designed to mount using existing factory bolt holes and grommets. Returns to stock in under an hour if needed.
Specifications
Brand: Flashark
SKU: FLIS25057
Material: Aluminum piping
Tubing Finish: Black powder-coated
Tube Outer Diameter: 3.0" (76mm)
Tube Wall Thickness: 1.6mm
Filter Type: Dry (no oil required)
Filter Shape: Conical
Filter Media: Synthetic dry cotton gauze
Coupler Material: 4-ply reinforced silicone (black)
Clamp Type: Stainless steel T-bolt
Intake Routing: Fender well (cold air)
Weight: ~7.5 lbs (3.4 kg) complete
Installation Time: 60–90 minutes
Fits: 2002-2007 Subaru Impreza WRX (Sedan & Wagon)
Package Includes
1 × 3.0" intake tube
1 × Dry synthetic cone filter
1 × 4-ply reinforced silicone couplers
3 × Stainless steel T-bolt clamps
1 × Vehicle-specific mounting bracket with hardware
1 × Installation instruction sheet
| Years | Make | Model | Engine |
|---|---|---|---|
| 2002–2005 | Subaru | Impreza WRX Sedan (GD) | EJ205 2.0L Turbo |
| 2002–2005 | Subaru | Impreza WRX Wagon (GG) | EJ205 2.0L Turbo |
| 2006–2007 | Subaru | Impreza WRX Sedan (GD) | EJ255 2.5L Turbo |
| 2006–2007 | Subaru | Impreza WRX Wagon (GG) | EJ255 2.5L Turbo |
Q1: Will this intake fit my 2002-2007 Subaru WRX?
A: Yes — this kit fits all 2002-2007 USDM Subaru Impreza WRX models, both Sedan (GD) and Wagon (GG), with the factory EJ205 2.0L turbo (2002-2005) or EJ255 2.5L turbo (2006-2007). It is specifically designed for the WRX's MAF housing and intake routing.
Q2: Does this fit the WRX STI?
A: No. This kit is for the WRX only, not the STI. The STI uses a different MAF housing diameter, a different turbocharger (VF39/VF43 vs TD04/VF52 on the WRX), and a different intake manifold design. Installing this on an STI would result in incorrect MAF scaling and potential engine damage without a custom tune. If you have an STI, use an STI-specific intake.
Q3: Do I need a tune after installing this intake?
A: Yes — strongly recommended. Subaru turbo engines rely on the MAF sensor to calculate fuel delivery. When you change the intake tube diameter and airflow characteristics, the MAF scaling changes. Running without a tune can result in a lean air-fuel ratio under boost, which can cause detonation and engine damage. An off-the-shelf Cobb Accessport Stage 1+ map or an open-source ECU flash tuned for an aftermarket intake is the safe minimum.
Q4: Will this cause a check engine light (CEL)?
A: If installed correctly and combined with an appropriate tune, no. A CEL after intake installation on a Subaru is typically caused by: (1) an air leak at a coupler or MAF flange, (2) the MAF sensor installed backward or clocked incorrectly, or (3) the ECU detecting fuel trims outside the expected range because no tune was applied. Double-check all clamp connections and MAF orientation before starting the engine.
Q5: Is this a true cold air intake or a short ram?
A: This is a true cold air intake with the filter positioned in the passenger-side fender well, away from engine bay heat. Unlike a short ram intake that pulls hot air directly from behind the radiator, the fender well location provides consistently cooler intake air temperatures, which matters significantly on a turbocharged engine, where intake air temperature directly affects knock threshold and timing advance.
Q6: Is the filter oiled or dry? Will it damage my MAF sensor?
A: The filter is a dry synthetic media — no oil required. This is critical for turbo Subaru engines. Oiled filters (such as K&N) can shed excess oil onto the hot-wire MAF sensor element, causing inaccurate airflow readings, fuel trim drift, and eventually sensor failure. The dry filter in this kit eliminates that risk entirely while still providing excellent filtration efficiency.
Q7: What is the pipe diameter and material?
A: The intake tube is 3.0 inches (76mm) outer diameter, mandrel-bent from lightweight aluminum with a black powder-coated finish. The coating provides heat resistance (rated to 400°F/204°C), corrosion resistance, and a clean under-hood appearance. Silicone couplers are 4-ply reinforced for durability under boost and vacuum conditions.
Q8: How much power will I gain?
A: On a stock-tune WRX with this intake installed (and properly tuned), typical gains are 8-15 WHP and 8-12 lb-ft of torque. The most noticeable improvement is not the peak number but the area under the curve: faster turbo spool, sharper throttle response, and more consistent power delivery across the mid-range. Gains increase when combined with a downpipe, exhaust, and a proper custom tune. Claims of 20+ WHP from an intake alone on a stock-turbo WRX are unrealistic — be skeptical of inflated marketing numbers.
Q9: Will this make my WRX louder?
A: Yes, and that's part of the appeal. You will hear a distinct turbo spool whistle (the "whoosh" as the turbo builds boost), a crisper bypass valve release on throttle lift, and a deeper induction growl under wide-open throttle. The sound is significantly more aggressive than stock but not obnoxiously loud — think of it as unlocking the sounds your turbo has been making all along, just muted by the factory airbox.
Q10: Is this intake safe for daily driving?
A: Yes, with two important caveats: (1) Get a tune. Running an untuned engine with a larger intake on a Subaru is not safe. (2) Avoid deep water. Because the filter sits low in the fender well, driving through standing water deep enough to submerge the filter can cause hydrolock (water ingestion into the engine), which will destroy the engine instantly. For normal wet-road driving, rain, and puddles, there is no risk — the filter is protected by the fender liner and bumper cover.
Q11: What's the install difficulty? Can I do it myself?
A: Moderate difficulty. Budget 60-90 minutes if you have basic mechanical experience and hand tools. The process involves: removing the factory airbox and intake snorkel (straightforward); removing the passenger-side front wheel and fender liner to access the fender well (most of your time); mounting the new filter and tube; connecting the MAF sensor; and securing the breather lines. No cutting or permanent modification is required. If you've never turned a wrench before, budget 2 hours and have a friend help.
Q12: Does this intake fit with an aftermarket intercooler, blow-off valve, turbo inlet, or other mods?
A: It depends on the specific combination. This intake is designed to work with the factory top-mount intercooler and factory turbo inlet. Aftermarket turbo inlets, front-mount intercooler piping, aftermarket blow-off valves, and strut tower braces may interfere with one another depending on their design and routing. If you have multiple aftermarket parts in the engine bay, check clearance before ordering.
Q13: Will this improve my fuel economy?
A: In theory, improved volumetric efficiency can slightly improve cruising MPG — but in practice, the more responsive throttle and aggressive intake sound tend to encourage spirited driving, which negates any real-world fuel savings. If fuel economy is your goal, leave the factory intake alone and focus on tire pressure and driving habits.
Q14: Does this intake work with the factory airbox snorkel delete?
A: This kit completely replaces the factory airbox and snorkel, so a snorkel delete becomes irrelevant. The entire OEM intake tract, from the airbox to the turbo inlet pipe, is removed and replaced with this kit's piping and filter.
Q15: Can I return this if it doesn't fit?
A: Flashark offers a 14-day return policy. Returns are accepted if the kit is new, uninstalled, and in original packaging. Once installed or used, the kit cannot be returned. If you're unsure about fitment — especially if your WRX has non-factory modifications — contact us at service@flasharkracing.com before purchasing with your vehicle details, and we'll confirm compatibility.
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