SKU: 12002-AK015 | UPC: 4957266620960
HKS GT S/C Oil Filter for Subaru WRX STI 2004-2021
The HKS GT S/C Oil Filter provides critical lubrication for supercharged Subaru WRX STI engines in 2004-2021 Impreza models equipped with HKS GT Supercharger systems. This direct-fit filter maintains steady oil flow and pressure during high-boost track or street driving to shield bearings and gears from damage. Its design supports EJ20 and EJ25 engines in compatible Subaru applications for consistent performance.
Key Features
- High-Flow Media: Enables unrestricted oil circulation to supercharger bearings and components for reliable operation under sustained boost
- Steel Construction: Handles extreme pressures and heat in forced-induction setups without deformation
- Advanced Filtration: Captures particles down to 20 microns to keep oil clean and prevent circuit contamination
- Direct OEM Replacement: Matches threading on HKS GT Supercharger oil pumps for plug-and-play installation
- Extended Durability: Built for 10,000-mile intervals in supercharged Subaru engines
Product Notes
- Replace at every supercharger oil change to ensure peak reliability
- Prime the oil system before engine startup after installation
- Ships in protective box measuring 3 x 3 x 6 inches
Installation Notes
- Professional installation recommended.
- Drain supercharger oil circuit fully before filter removal
- Torque to 18 ft-lbs using HKS oil filter wrench
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004-2021 | Subaru | Impreza WRX STI | All |
| 2005-2009 | Subaru | Legacy | 2.5 GT |
| 2008-2014 | Subaru | Impreza WRX | All |
| 2004-2018 | Subaru | Forester STI | All |
Why Choose HKS?
- Trusted by motorsport teams since 1973
- Precision manufacturing from Japan
- Tested in high-boost racing environments
Frequently Asked Questions
-
Q: Will this fit my 2015 WRX STI with HKS GT Supercharger?
A: Yes it bolts directly to the HKS GT2 or GTIII supercharger oil pump on 2004-2021 STI models -
Q: What material is the filter housing?
A: Heavy-duty steel canister with anti-corrosion coating resists heat and pressure -
Q: What is the service interval and warranty?
A: Change every 10,000 miles or annually backed by HKS limited lifetime warranty on defects
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Compact box 3 x 3 x 6 inches
- Weight: 0.35 lbs
Forced Induction
Forced induction systems encompass every method of pushing air into an engine at greater than atmospheric pressure, including turbochargers driven by exhaust energy, superchargers driven mechanically by the crankshaft, and prochargers using centrifugal designs belt-driven at higher ratios than traditional roots-type blowers, with each approach delivering a significant increase in air mass per cylinder fill that allows proportionally more fuel to be burned and more power to be produced without increasing engine displacement. Adding 10 PSI of boost pressure to a naturally aspirated engine can increase power output by 50 to 70 percent depending on the engine's breathing efficiency and the quality of the supporting hardware, making forced induction the most power-dense modification available relative to cost and complexity. This collection covers complete forced induction systems, turbocharger and supercharger hardware, intercoolers, blow-off valves, wastegates, and supporting component...
View Forced Induction Products
HKS
HKS is a Japanese manufacturer of premium performance parts founded in 1973 that has been at the forefront of turbocharged engine development, producing turbochargers, exhaust systems, engine management, intercoolers, and supporting performance components for some of the most iconic Japanese sports cars ever built. The brand's GT and GTIII turbocharger series, Super Sequential Blow Off Valves, and Racing Suction intake kits are recognized globally as benchmark-quality products that combine Japanese manufacturing precision with decades of motorsport development experience. HKS products are particularly well-known in the Toyota Supra, Mitsubishi Evo, Subaru STI, Nissan GT-R, and Honda NSX communities, where the brand's heritage in building the world's fastest versions of these cars has created a loyal following among enthusiasts who want the best available components. From a simple racing suction kit to a complete GT turbo with intercooler and ECU tune, HKS provides an end-to-end perf...
View HKS Products
Superchargers
Superchargers are belt-driven forced induction devices that compress intake air entering the engine, increasing the air-fuel charge density and allowing more fuel to be burned per combustion cycle. Unlike turbochargers, superchargers are driven directly by the crankshaft and deliver boost without lag at any throttle position. Types of Superchargers Available The main supercharger types available for aftermarket applications include Roots-type positive displacement blowers for strong low-RPM torque and immediate throttle response, twin-screw positive displacement superchargers offering excellent efficiency and heat management, and centrifugal superchargers that deliver boost progressively through the RPM range, similar to a turbocharger, and are popular on compact engine bays due to their smaller footprint. What vehicles can be supercharged? Bolt-on supercharger kits are available for many naturally aspirated V8 and V6 platforms including Ford Mustang, Chevrolet Corvette, Camaro, and...
View Superchargers Products
Superchargers & Components
Superchargers and supercharger components cover the complete forced induction drivetrain from the belt-driven compressor unit through the intercooling system, drive pulleys, and intake manifold components. Quality supercharger components maintain reliable boost delivery and maximize the performance potential of supercharged engines. Popular Supercharger Components Popular supercharger components include replacement and upgrade drive pulleys, overdrive nose pulley kits, supercharger drive belts and belt kits, heat exchanger and liquid-to-air intercooler upgrades for positive displacement superchargers, bypass valve upgrades, and rotor assembly rebuild kits for high-mileage factory superchargers. Intake manifold spacers and porting services are also popular on popular Roots-type blower platforms. When should supercharger components be serviced? Supercharger drive belts should be inspected at regular service intervals and replaced when wear, cracking, or glazing is observed. Supercharg...
View Superchargers & Components Products


