Best Blow Off Valves for Subaru WRX: Top High-Performance Picks
If you own a Subaru WRX and want to enhance your turbocharged engine’s performance, choosing the right blow off valve (BOV) is essential. Blow off valves help regulate boost pressure, protect the turbo, and improve throttle response. This guide features high-quality BOVs and compatible parts designed specifically for WRX models, helping you make an informed purchase for durability and efficiency.
| Product Name | Brand | Compatibility |
|---|---|---|
| Angle Flange Blow Off Valve For Subaru 02-07 IMPREZA WRX STI SQV SSQV HKS BOV | KINUGAWA | 2002-2007 Subaru Impreza WRX STI, 2008-2012 STi |
| Autobahn88 CNC Aluminum Blitz Blow Off Valve BOV Adapter Flange | Autobahn88 | 2001-2007 Subaru Impreza WRX GDA GDB |
| Subaru Genuine Intercooler & Blow off Y-Pipe Gaskets Set of 3 OEM | Subaru | 2002-2005 WRX, 2004-2018 STi |
| Subaru Turbo Turbocharger Intercooler-Bypass Blow Off Valve Gasket | Subaru | 2008-2014 Impreza WRX |
| BILLFARO Billet Blow Off Valve Mod, Vent to Atmosphere Mod Plug | BILLFARO | 2013-2023 Ford F-150 EcoBoost (not Subaru but useful concept for VTA mods) |
Angle Flange Blow Off Valve For 02-07 Subaru WRX STI
The KINUGAWA Angle Flange Blow Off Valve is designed specifically for Subaru 2002-2007 Impreza WRX STI and compatible with 2008 to 2012 Subaru STi models. It offers a reliable fit for EJ20 and EJ25 engines. This valve helps manage boost levels by releasing excess pressure, protecting the turbocharger system while improving throttle response and engine boost control. Its angle flange design ensures easy installation in turbocharged Subaru engines.
CNC Aluminum Blitz Blow Off Valve Adapter Flange for 01-07 Subaru WRX
Made by Autobahn88, this adapter flange is a perfect match for all Blitz blow off valves, including the Super Sound BOV. It fits top mount intercooler models of the 2001-2007 Subaru Impreza WRX platforms GDA and GDB. Crafted from CNC-machined aluminum, it guarantees durability, precision fitment, and easy bolt-on installation. This part is essential for Turbo Subaru WRX owners aiming to upgrade or replace existing blow off valve adapters without compromising performance.
Subaru Genuine Intercooler & Blow Off Y-Pipe Gaskets Set
This OEM gasket set from Subaru includes two intercooler gaskets and one blow off valve gasket, designed for Subaru EJ205 turbo engines between 2002 and 2005 WRX and STi models through 2018. These genuine parts ensure a tight and leak-proof seal between the intercooler and blow off valve components, preventing boost leaks and helping maintain optimum turbo efficiency. Using genuine gaskets is key to sustaining factory-level performance and reliability.
Subaru Turbocharger By-pass Blow Off Valve Gasket O-Ring
This genuine OEM Subaru O-ring is designed to fit the blow off valve bypass system on 2008-2014 Subaru WRX models. It is essential for ensuring a tight seal around the BOV housing, preventing unwanted air leaks that detract from turbo pressure and efficiency. Regular inspection and replacement of O-rings help maintain optimal engine performance and prevent boost loss.
BILLFARO Billet Blow Off Valve Vent to Atmosphere Mod Plug
Though made primarily for Ford EcoBoost engines, the BILLFARO Billet Blow Off Valve Mod Plug illustrates the benefits of a vent-to-atmosphere (VTA) blow off valve mod. Crafted from CNC-machined billet aluminum, it helps vent hot pressurized air directly to the atmosphere, reducing intake air temperatures and improving engine responsiveness. For WRX owners, VTA style valves provide distinct turbo noises and can be effective when properly adapted. It features an easy installation process without special tools.
Buying Guide for Subaru WRX Blow Off Valves
Choosing the best blow off valve for your Subaru WRX requires understanding several key factors to match your vehicle’s specifications and your driving style.
Compatibility and Fitment
Always check if the BOV is designed for your WRX model year and engine type (EJ20, EJ25, etc.). Proper fitment ensures ease of installation and prevents leaks. OEM and compatible gaskets or adapters may also be necessary for seamless integration.
Type of Blow Off Valve
- Recirculating Valve (RV): Dumps excess boost back into the intake to reduce noise and maintain turbo spool during gear shifts.
- Vent to Atmosphere (VTA): Releases pressure into the air, creating the classic “whoosh” sound favored by many enthusiasts but may cause some turbo lag in certain setups.
Choose based on your desired sound and performance balance.
Material and Build Quality
Look for CNC-machined aluminum or billet components for durability, heat resistance, and precision engineering. Rust-resistant and OEM-grade materials contribute to longer life and consistent performance.
Boost Pressure Handling
Ensure the valve can handle the maximum boost pressure of your turbo setup. Check manufacturers’ specifications for pressure limits to avoid valve failure or poor performance.
Installation Requirements
Some BOVs require adapters or additional parts like gaskets and O-rings. Confirm included hardware and the level of mechanical skill or tools needed. Plug-and-play mounts reduce installation time significantly.
Sound Preference
The sound emitted by the blow off valve varies by design. If you want a subtle or nearly silent release, choose recirculating valves. If you prefer an aggressive, sporty sound, VTA valves are recommended.
Maintaining Turbocharger Health
A good BOV protects the turbo by releasing pressure spikes and preventing compressor surge, thus extending turbo life. Choose valves designed for Subaru WRX specifically to maintain engine harmony.
Warranty and Brand Reputation
Purchase from reputed brands with positive feedback to ensure product reliability and customer support. OEM parts offer factory standards but aftermarket options provide customization and sometimes improved performance.