COBB Tuning Fuel Pressure Regulator Manifold Relocation Kit – 2008-2021 Subaru STI

Cobb Fuel Pressure Regulator Manifold Relocation Kit — 2008-2021 Subaru STI

The Cobb Fuel Pressure Regulator Manifold Relocation Kit for the 2008-2021 Subaru STI provides the hardware needed to relocate the fuel pressure regulator from the factory manifold-mounted position to an alternative location. The relocation is often needed when intake manifold modifications or aftermarket manifolds place the factory FPR location in a conflicting position.

DETAILS

• Platform: 2008-2021 Subaru WRX STI EJ257
• Relocates factory or aftermarket FPR from manifold-mounted to alternate position
• Required with certain aftermarket intake manifolds
• All fittings, brackets, and hardware included

FPR Relocation for Aftermarket Manifold Builds

A fuel pressure regulator maintains a constant fuel rail pressure relative to intake manifold pressure. Stock fuel pressure regulators on most Subaru STI applications maintain adequate fuel pressure for factory power levels, but as power increases through larger turbochargers, higher boost, and higher injector duty cycles, the factory regulator can become a limiting factor. An upgraded fuel pressure regulator provides consistent rail pressure at higher flow rates — ensuring the injectors receive the correct pressure differential regardless of how hard the fuel system is being pushed.

Bracket, Fittings, and Clean Installation Hardware

The Cobb fuel pressure regulator installs at the factory location on the fuel rail, using the factory fuel line connections. Fuel pressure is adjustable on some variants via a bleed screw, allowing the base pressure to be dialed in to match the injector and fuel pump combination in the build. A fuel pressure sensor kit is typically used alongside the regulator to monitor actual rail pressure in real time via the Accessport gauge display — providing confirmation that the regulator is maintaining correct pressure during hard acceleration.

What’s in the Box

• FPR relocation bracket
• Fuel fittings and lines
• All hardware

Why Choose Cobb Tuning

Cobb Tuning has been developing performance software and hardware for turbocharged enthusiast vehicles since 1999. Founded in Austin, Texas, Cobb built its reputation on the Accessport and expanded into a full catalog of hardware engineered to complement it. Every OTS map is developed in-house on real vehicles, and every hardware product is validated as part of a complete system — not sourced and sold in isolation. That integrated approach is why Cobb produces consistent, reliable results across the builds we see every day.

The RallySport Take

The Cobb FPR manifold relocation kit for the 2008-2021 STI is the installation solution for EJ257 builds where the standard FPR manifold-mount position is not available. Provides correct fuel line routing to the relocated FPR position without custom fabrication.

Fitment

Year	Make	Model	Notes
2008-2021	Subaru	WRX STI	EJ257 MT