SKU: 4599-RA016 | UPC: 4957266556238
HKS 6mm Vacuum Breather Filter for Subaru Impreza WRX STI 2002-2021 4599-RA016
The HKS 6mm vacuum filter/breather filter provides reliable filtration for crankcase ventilation on Subaru Impreza WRX STI 2002-2021 Legacy GT and Forester XT. It captures oil mist and contaminants from blow-by gases to keep intake tracts clean and sustain vacuum flow. This compact filter connects directly to 6mm hoses for straightforward engine bay enhancement.
Key Features
- High Filtration Efficiency: Specialized element traps over 99% of oil particles larger than 1 micron for reduced contamination
- Low Airflow Restriction: Maintains vacuum pressure with minimal resistance during high RPM operation
- Compact Dimensions: 38mm diameter x 40mm length fits tight engine compartments without modifications
- Durable Flame-Resistant Construction: Heat-resistant body and filter withstand track conditions up to 120°C
- Replaceable Filter Element: Serviceable design extends service life with HKS replacement media available
Product Notes
- Pair with oil catch tanks for complete PCV system upgrade
- Clean or replace filter element every 10,000 miles or annually
- Product weight 20g shipping weight 0.1 lbs
Installation Notes
- Professional installation recommended.
- Push-fit onto 6mm ID vacuum or breather hoses no tools required
- Secure with hose clamps or zip ties for high-boost applications
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2007 | Subaru | Impreza | WRX |
| 2004-2021 | Subaru | Impreza WRX | STI |
| 2004-2009 | Subaru | Legacy | GT |
| 2004-2013 | Subaru | Forester | XT |
| Universal | Any | 6mm Hose PCV | N/A |
Why Choose HKS?
- 45+ years of JDM tuning expertise trusted in WRC and Super GT racing
- Manufactured to exacting Japanese standards for consistent performance
- Backed by motorsport testing for reliability under extreme conditions
Frequently Asked Questions
- Q: Does this fit 2006 Subaru STI EJ257 engine?
A: Yes direct fit on factory or aftermarket 6mm breather hoses for all listed Subaru models - Q: What material is the filter made from?
A: Flame-retardant synthetic media in a heat-resistant resin body for durability and safety - Q: Is there a warranty on this part?
A: Covered by HKS standard limited warranty against manufacturing defects contact seller for details
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock – ships same or next business day
- Packaging: Compact box 2.5 x 2 x 1.5 inches
- Weight: 0.1 lbs
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