{"product_id":"radium-engineering-dual-port-injection-fuel-rails-2002-2014-subaru-wrx-20-0499","title":"Radium Engineering Dual Port Injection Fuel Rails | 2002-2014 Subaru WRX (20-0499)","description":"\u003cp\u003e\u003cstrong\u003eEight injectors on a four-cylinder boxer, and these rails feed all of them.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eRadium Engineering Dual Port Injection (DPI) Fuel Rails for the Subaru EJ\u003c\/strong\u003e allow two fuel injectors per cylinder runner, \u003ccite index=\"109-1\"\u003eCNC machined and designed specifically for use with the Radium 20-0489-XX TGV housings\u003c\/cite\u003e, and \u003ccite index=\"112-1\"\u003eNOT compatible with any other housings on the market. The rails are manufactured with large 10AN ORB end ports supporting all necessary engine power requirements, with top auxiliary ports threaded 8AN ORB for ancillary accessories.\u003c\/cite\u003e Each rail carries 4 injector ports machined for 14mm O-rings, with adapters serving both the primary and secondary injector positions. Injectors sold separately.\u003c\/p\u003e\n\u003ch3\u003eWhat You'll Feel\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStaged fueling capacity for big-power and flex fuel EJ builds, eight injectors strong\u003c\/li\u003e\n\u003cli\u003eIdle and drivability preserved by the primaries while the secondaries carry top-end demand\u003c\/li\u003e\n\u003cli\u003eMassive 10AN feed architecture with 8AN auxiliary ports for dampers and sensors\u003c\/li\u003e\n\u003cli\u003eOEM Subaru injectors reusable in the primary positions via the provided top hats\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDPI fuel rails for Radium 20-0489-00\/-01 TGV housing kits ONLY; not compatible with other housings\u003c\/li\u003e\n\u003cli\u003e10AN ORB end ports; 8AN ORB top auxiliary ports; 4 injector ports per rail, 14mm O-ring machined\u003c\/li\u003e\n\u003cli\u003e\u003ccite index=\"115-1\"\u003ePrimary lower injectors: OEM Subaru (with provided top hat over the upper O-ring) or 60mm Bosch EV14 style (with provided injector seat over the lower O-ring)\u003c\/cite\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ccite index=\"112-1\"\u003eSecondary upper injectors: only 34mm Bosch EV14 style\u003c\/cite\u003e\u003c\/li\u003e\n\u003cli\u003eVerified lower primaries: ID1050\/1300\/1700\/2600-XDS-60-14-14; many owners already run ID WRX-fitment 48.11 injectors up top\u003c\/li\u003e\n\u003cli\u003eAll fuel types including E85; injectors NOT included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Details\u003c\/h3\u003e\n\u003cp\u003eDual port injection solves the flex fuel math problem, since E85's volume demand at full power would need primary injectors too large to idle cleanly, and the DPI architecture splits the duty: reasonable primaries idle and cruise, secondaries stage in as load climbs, and the tune blends them. The system dependency is absolute, with these rails machined around the Radium TGV housing kits' injector bosses, so the 20-0489 housings come first in the build plan. One plumbing note from Radium matters at ordering time: the Subaru EJ series and parallel rail plumbing kits are NOT compatible with this DPI rail kit, so DPI plumbing is configured with individual fittings per your system. Injector selection follows the documented lists, dimensions confirmed with the manufacturer.\u003c\/p\u003e\n\u003ch3\u003eKit Includes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2x CNC machined DPI fuel rails (4 injector ports each)\u003c\/li\u003e\n\u003cli\u003eInjector top hats (OEM primary reuse) and injector seats (EV14 primary use)\u003c\/li\u003e\n\u003cli\u003eMounting hardware\u003c\/li\u003e\n\u003cli\u003eTGV housings (20-0489-XX), injectors, and fittings NOT included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2002-2014 Subaru WRX and EJ-family engines running Radium 20-0489-00\/-01 TGV housings\u003c\/li\u003e\n\u003cli\u003ePrimaries: OEM Subaru or 60mm EV14; Secondaries: 34mm EV14 only\u003c\/li\u003e\n\u003cli\u003eNOT compatible with Radium EJ series\/parallel rail plumbing kits\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Radium Engineering","offers":[{"title":"Default Title","offer_id":43672701763651,"sku":"20-0499","price":237.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0064\/7754\/5539\/files\/radium-engineering-rad-20-0499-29454193590342_90a8f49f-7e43-46be-b27b-3e90627b0d09.jpg?v=1786717259","url":"https:\/\/www.tunedbyshawn.com\/products\/radium-engineering-dual-port-injection-fuel-rails-2002-2014-subaru-wrx-20-0499","provider":"Tuned by Shawn","version":"1.0","type":"link"}