Cobb Fuel Pressure Regulator Manifold Reference Relocation Kit 2008-2021 Subaru STI | 315150

Product Description

Fitment Information:

2008-2021 Subaru STI

The COBB Tuning Fuel Pressure Regulator Manifold Reference Relocation Kit includes everything you need to relocate the FPR reference line to a more stable pressure source.

Features:

Improved Vacuum Reference for the FPR - Plenum Based (COBB) vs. Individual Cylinder Runner (OEM)

Reducing "T" Fitting

4mm and 6mm Silicone Vacuum Line

Black Zip Ties

Easy Installation

Installation Instructions

This allows for moving the fuel pressure regulator's manifold pressure reference away from the #4 cylinder runner and into a plenum-based source, similar to the method used on the previous generation 2004-2007 STI. This helps prevent unwanted manifold pulsations from affecting the FPR as the plenum is a common area of the manifold that represents the average vacuum/boost of all cylinders rather than a singular cylinder.