Radium Engineering Fuel Pressure Regulator Kit Subaru WRX STI 2008-2021 (EJ257 Only) - 20-0965

Radium Engineering 20-0965 fuel pressure regulator kit for the 2008-2021 Subaru WRX STI with the EJ257 engine. Replaces the OEM regulator and damper assembly.

• Installs in the OEM regulator location
• Reroutes fuel through the fuel rails before the regulator and back to the tank
• Includes vacuum hose and fittings to move the vacuum reference from the #4 cylinder runner to the intake manifold plenum for a steadier signal
• Tool-less pressure adjustment with a knob, no jam nut or set screw
• Detents adjust pressure about 1 psi each (plus or minus 0.5 psi), depending on current pressure
• Single stainless steel return orifice for laminar flow and stability
• 360 degree swiveling, double O-ring sealed vacuum port with four 10-32 vacuum fittings: barbed (3/16 in barb, fits 4, 5 and 6mm hose), 3AN male, push-to-connect (1/4 in OD tubing) and vacuum plug
• Unused 8AN ORB gauge port accepts the optional gauge kit 20-0386 (sold separately)
• Compatible with gasoline (unleaded, leaded, oxygenated, premix) and alcohol blends (methanol, ethanol, E85)

Included

• Multi-port regulator
• OE fuel line disconnect tool
• SAE quick connect to AN adapters
• EFI hose and pushlok hose ends
• Vacuum hose
• Fittings and installation hardware

Fitment

• Subaru WRX STI 2008-2021 (USDM), EJ257 engine only. (Source: Radium Engineering)

Resources

• Radium Engineering product page
• Radium installation instructions (PDF)

Contact us if you are unsure of fitment or Size HERE