{"product_id":"radium-engineering-08-21-subaru-wrx-sti-ej257-only-ra-series-fuel-pressure-regulator-kit","title":"Radium Engineering 08-21 Subaru WRX STi (EJ257 Only) RA-Series Fuel Pressure Regulator Kit","description":"\u003cp\u003eFor a properly planned performance build, the Radium Engineering 08-21 Subaru WRX STi (EJ257 Only) RA-Series Fuel Pressure Regulator Kit controls EFI fuel pressure and returns excess fuel so injectors see a stable, tunable pressure supply. Radium regulators are intended for performance return-style systems where consistent pressure control is important as fuel demand and manifold pressure change.\u003c\/p\u003e\u003cp\u003eFitment is specific to 08-21 Subaru WRX STi (EJ257 Only) RA-Series; confirm the vehicle and surrounding hardware before ordering. A fuel return must be routed back to the tank or surge tank. Match regulator port sizes and pressure range to the fuel-system design.\u003c\/p\u003e","brand":"Radium Engineering","offers":[{"title":"Default Title","offer_id":49207010984187,"sku":"rad20-0965","price":256.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0717\/5893\/files\/a98c4f8e3177b1dac604b535c37bcce7L.jpg?v=1788204402","url":"https:\/\/www.pandamotorworks.com\/products\/radium-engineering-08-21-subaru-wrx-sti-ej257-only-ra-series-fuel-pressure-regulator-kit","provider":"Panda Motorworks","version":"1.0","type":"link"}