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

This COBB Tuning kit is designed for 2008 - 2021 Subaru STI. It helps you relocate the FPR reference line to a more stable pressure source. Key features include an improved plenum - based vacuum reference for the FPR (compared to the OEM's individual cylinder runner), a reducing 'T' fitting, 4mm and 6mm silicone vacuum lines, black zip ties, easy installation, and installation instructions. By moving the manifold pressure reference from the #4 cylinder runner to a plenum - based source, like the 2004 - 2007 STI, it prevents unwanted manifold pulsations from affecting the FPR as the plenum represents the average vacuum/boost of all cylinders.

Using this kit is a breeze. First, carefully follow the installation instructions that come with it. You'll need to move the fuel pressure regulator's manifold pressure reference from the #4 cylinder runner to the plenum - based source. Make sure to use the included reducing 'T' fitting, 4mm and 6mm silicone vacuum lines, and black zip ties as directed. When installing, take your time to ensure everything is properly connected. As for maintenance, periodically check the vacuum lines for any signs of wear or damage. If you notice any issues, replace the lines right away. Also, keep an eye on the zip ties to make sure they're still tight. And remember, if you have any questions during installation or use, don't hesitate to reach out for help.