Specifications
Part Details:
2026 WRX note: this kit is not yet approved for sale in California for the 2026 model year specifically, while COBB works toward expanding CARB EO coverage. All other covered model years carry an issued CARB Executive Order.
As demand on the high pressure fuel pump increases, whether from a tune, bolt-ons, or simply pushing the engine harder, the low pressure side of the fuel system can start to fall behind, leading to cavitation at the HPFP. This COBB In-Tank Fuel Pressure Regulator is a simple modification that raises low-side fuel pressure to 4.5 bar, giving the HPFP a stronger, more consistent supply and helping prevent that cavitation before it becomes a fueling problem.
This regulator kit also fits several other Subaru and Toyota platforms sharing the same fuel system architecture, including Outback XT, Outback Wilderness, Ascent, Legacy, BRZ, and GR86.
Key Features
- Fits 2022 and newer Subaru WRX
- Increases in-tank fuel pressure to 4.5 bar
- Helps prevent HPFP cavitation under high fuel demand
- CARB Executive Order issued for most covered model years (D-660-304, D-660-338)
- Simple, straightforward installation
Frequently Asked Questions
Do I need this if I’m not modified yet?
This is primarily a supporting upgrade for builds pushing higher fuel demand. If your WRX is stock, it may not be necessary yet, but it’s a smart addition before adding power.
Is this legal in California?
Most covered model years have an issued CARB Executive Order and are legal for sale and use in all 50 states. The 2026 WRX specifically is not yet approved for California sale while COBB works toward expanding that coverage.
Do I need a tune to install this?
COBB does not list this as requiring a tune, though consulting a qualified tuner is always good practice anytime the fuel system is modified.
Recommended Supporting Components
- WRX Fuel System Upgrades explore injectors, fuel pumps, and fuel delivery upgrades for your WRX build.
- Fuel Pumps vs Injectors: Which Upgrade Matters More compare where to prioritize your fuel system budget.
Why Buy Fuel System Upgrades from Wrench Masters?
Wrench Masters carries the fuel system components that support the power you’re actually building toward, not just the bolt-ons. Preventing HPFP cavitation before it happens is far cheaper than dealing with a fuel starvation issue later.
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Delivery Times:
- In Stock: 3-7 Business Days
- Custom Orders: 2-6 Weeks, Please Email: [email protected] or Call: 727-565-9808 for Questions.
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