Description
Comparison points and tradeoffs
When comparing 1ST Air Inject Check Valve Set of 2 with Gasket for Subaru Forester 2005-2013, for Impreza 2006-2012, for WRX 2013-2019 Replaces OE: 911-169+911-170 with other Air Check Valves options, use this source-backed detail as the primary discriminator: Application note: Please select according to your vehicle’s OEM number to ensure compatibility Protects System Components: Shields the air pump and related parts from damage caused by reverse flow Enhances Engine Efficiency: Supports optimal combustion during cold starts for smoother performance Easy Installation: Engineered for a simple, direct replacement with an OE fit, ensuring a straightforward installation.
Use this second fact to evaluate the tradeoff: Application note: About this item Direct Fit: This Air Inject Check Valve is designed for Subaru Forester 2005-2013, for Impreza 2006-2012, for WRX 2013-2019 OEM Part Number: Replacing OE part 911169, 14864AA020, 911170, 14864AA030. A third point to compare across alternatives is: Category: Replacement Parts / Exhaust & Emissions / Air Check Valves.
Alternative-selection boundary
Choose an alternative when its stated identifiers, application, package, or specifications better match the requirement; no unverified competitor claim is introduced here.
Complete source-backed product details
Product Description
Source product highlights
About this item
- Direct Fit: This Air Inject Check Valve is designed for Subaru Forester 2005-2013, for Impreza 2006-2012, for WRX 2013-2019
- OEM Part Number: Replacing OE part 911169, 14864AA020, 911170, 14864AA030. Please select according to your vehicle’s OEM number to ensure compatibility
- Protects System Components: Shields the air pump and related parts from damage caused by reverse flow
- Enhances Engine Efficiency: Supports optimal combustion during cold starts for smoother performance
- Easy Installation: Engineered for a simple, direct replacement with an OE fit, ensuring a straightforward installation. One year warranty




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