{"product_id":"radium-top-feed-secondary-fuel-rail-conversion-kit-mazda-13b-rew-20-0447","title":"Radium Top Feed Secondary Fuel Rail Conversion Kit | Mazda 13B-REW (20-0447)","description":"\u003cp\u003e\u003cstrong\u003eThe secondaries carry the 13B-REW's top-end fuel load, and one rail now covers every manifold that feeds them.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eRadium Engineering Top Feed Secondary Fuel Rail Conversion Kit for the Mazda 13B-REW\u003c\/strong\u003e is the adaptable half of the rotary conversion: with the provided 2AN ORB plugs, the design permits both the OEM 2-port intake manifold and aftermarket 4-port intake manifolds from one rail. Anodized black aluminum with a large internal bore supporting all necessary engine power requirements, three 8AN ORB ports with the extra center port hosting the OEM fuel temperature sensor (via 14-0421), a pressure transducer, or a pulse damper. Insulating spacers, washers, stainless hardware, and stainless M8 extension mounts are included, along with 14mm lower injector seats carrying FKM O-rings for boosted duty, compatible with or without the OEM diffusers. Injectors sold separately.\u003c\/p\u003e\n\u003ch3\u003eWhat You'll Feel\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTop-end fueling headroom on the injectors that come alive when a REW makes real power\u003c\/li\u003e\n\u003cli\u003eOne rail serving OEM 2-port and aftermarket 4-port manifolds via the included plug strategy\u003c\/li\u003e\n\u003cli\u003eBoost-sealed injector bases from the FKM O-ring seats\u003c\/li\u003e\n\u003cli\u003eCorrosion-proof mounting from the stainless M8 extension mounts\u003c\/li\u003e\n\u003cli\u003eThe OEM fuel temperature sensor retained on converted systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHigh flow secondary rail for the 13B-REW; converts to top feed injection\u003c\/li\u003e\n\u003cli\u003eAdaptable design: OEM 2-port manifold (20mm insulating spacers, billet seats, 2AN ORB plugs) and aftermarket 4-port manifolds (Xcessive uses the 11mm spacers) supported\u003c\/li\u003e\n\u003cli\u003eAnodized black aluminum, large internal bore, all fuels including E85\u003c\/li\u003e\n\u003cli\u003e3x 8AN ORB ports; center port for the OEM fuel temp sensor (14-0421), transducer, or damper\u003c\/li\u003e\n\u003cli\u003e14mm lower injector seats with FKM O-rings, compatible with or without OEM diffusers; 2x stainless M8 extension mounts\u003c\/li\u003e\n\u003cli\u003eVerified injectors: ID1050\/ID1300\/ID1700\/ID2600-XDS-60-14-14 (NOT included)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Details\u003c\/h3\u003e\n\u003cp\u003eTwo compatibility notes from Radium determine the parts list. On the OEM 2-port manifold, the required space means an air control valve delete for the OEM 13B-REW intake manifold is required, Radium's 20-0449, sold separately. On an Elite Rotary Shop 4-port manifold, 2 extra injector seats are required beyond the included set, purchased separately, while the Xcessive 4-port simply uses the included 11mm spacers. With this rail, all lower intake manifold variations converge on the same verified injector list, the ID XDS-60-14-14 family, which keeps injector planning simple regardless of manifold path. Plumbing and crossover to the primary rail run through 8AN ORB adapters selected per your system, with O-rings lubricated at every install step.\u003c\/p\u003e\n\u003ch3\u003eKit Includes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x Black anodized high flow secondary fuel rail\u003c\/li\u003e\n\u003cli\u003e14mm lower injector seats with FKM O-rings; billet seats and 2AN ORB plugs for OEM manifold use\u003c\/li\u003e\n\u003cli\u003e20mm and 11mm insulating spacers, washers, stainless hardware, 2x stainless M8 extension mounts\u003c\/li\u003e\n\u003cli\u003eInjectors, port fittings, ACV delete (20-0449), and extra ERS seats NOT included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1992-2002 Mazda RX-7 FD3S (13B-REW)\u003c\/li\u003e\n\u003cli\u003eOEM 2-port intake manifold (requires 20-0449 ACV delete) and aftermarket 4-port manifolds (Xcessive; Elite Rotary Shop with 2 extra seats)\u003c\/li\u003e\n\u003cli\u003eVerified: ID1050\/1300\/1700\/2600-XDS-60-14-14 injectors\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Radium Engineering","offers":[{"title":"Default Title","offer_id":43672697765955,"sku":"20-0447","price":189.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0064\/7754\/5539\/files\/radium-engineering-rad-20-0447-11953411620934_889ad5e0-b46c-4ac0-8a72-08fdc212aef3.jpg?v=1786717183","url":"https:\/\/www.tunedbyshawn.com\/products\/radium-top-feed-secondary-fuel-rail-conversion-kit-mazda-13b-rew-20-0447","provider":"Tuned by Shawn","version":"1.0","type":"link"}