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The COBB Subaru 08-18 STI Fuel Pressure Regulator Kit is a plug-and-play solution that is simple and easy to install. It requires no cutting of factory hoses and is multi-fuel compatible. This kit includes the fuel pressure regulator manifold reference relocation kit. Attention Custom tuning required. Click Dealers to find a Protuner near you.Are you annoyed with that 2800 rpm stumble you get while driving your 2008 Subaru STI Wish you could easily fix it COBB has the answer the COBB Subaru 08 STI Fuel Pressure Regulator Kit. A plug-and-play solution that is simple and easy to install. It requires no cutting of factory hoses and is multi-fuel compatible. Compatible with Stage 3 OTS Maps custom tuning will be required for other setups. Attention Requires tuningFEATURES Subaru Fuel Pressure Regulator Kit STI 2008-2018 Plug-n-Play Application OEM Subaru Fuel Regulator Dorman Quick Connect Fuel Fittings Sheathing for Abrasion Resistance Flex Fuel Compatible