{"title":"Fuel Injector Sets - 4Cyl","description":"\u003cp\u003eShop matched fuel injector sets for four-cylinder engines. Compare flow rate, body length, connector and upper and lower O-ring dimensions with your application before ordering.\u003c\/p\u003e","products":[{"product_id":"injector-dynamics-id1050x-12-15-honda-civic-si-14mm-grey-adaptor-top-injectors-set-of-4","title":"Injector Dynamics ID1050X 12-15 Honda Civic SI 14mm (Grey) Adaptor Top Injectors - Set of 4","description":"Injector Dynamics ID1050X 12-15 Honda Civic SI 14mm (Grey) Adaptor Top Injectors - Set of 4","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496576004290,"sku":"IDX1050.07.21.48.14.4","price":600.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/4e2ee70bdb4c0db1c7917330bddfb9ec.jpg?v=1785157422"},{"product_id":"injector-dynamics-1050cc-inj-04-06-subaru-sti-turbo-top-feed-conversion-kit-two-2x8-lower-o-rings-4","title":"Injector Dynamics ID1050-XDS Top-Feed Conversion Kit with Dual Billet Fuel Rails for 2004–2006 Subaru STI (Set of 4)","description":"\u003cp\u003eThis Injector Dynamics top-feed conversion kit, manufacturer part number \u003cstrong\u003e1050.18.01.48.14.4\u003c\/strong\u003e, is listed specifically for the 2004–2006 Subaru STI. It converts the factory side-feed arrangement to top-feed port fuel injection (PFI). The kit includes four ID1050-XDS injectors, dual billet fuel rails, and two sets of 2x8 lower O-rings. This is a different configuration from the 2007+ STI application.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNominal flow rate: 1065 cc\/min at 3.0 bar (43.5 psi), rated with gasoline at 52°C (125°F)\u003c\/li\u003e\n\u003cli\u003eMaximum differential fuel pressure: 10.0 bar (145.0 psi)\u003c\/li\u003e\n\u003cli\u003eInjector body length: 48 mm\u003c\/li\u003e\n\u003cli\u003eUpper O-ring: 14 mm\u003c\/li\u003e\n\u003cli\u003eInjection architecture: top-feed port fuel injection (PFI) conversion\u003c\/li\u003e\n\u003cli\u003eElectrical: high impedance; USCAR connector; new mating connector supplied by Injector Dynamics\u003c\/li\u003e\n\u003cli\u003eFuel compatibility per Injector Dynamics: compatible with all known fuels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIncluded in This Kit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFour (4) ID1050-XDS injectors\u003c\/li\u003e\n\u003cli\u003eDual billet fuel rails\u003c\/li\u003e\n\u003cli\u003eTwo sets of 2x8 lower O-rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eListed by Injector Dynamics under part number 1050.18.01.48.14.4 for the 2004–2006 Subaru STI side-feed-to-top-feed conversion. \u003cstrong\u003eVerify compatibility using the exact manufacturer part number before ordering.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eAdditional Plumbing Required\u003c\/h3\u003e\n\u003cp\u003eThe separate conversion line\/plumbing kit is not included in this SKU. Injector Dynamics documents the AN lines, fittings, hose, clamps, series rail plumbing, and relocation of the factory fuel-pressure regulator required for the conversion. Confirm all required plumbing components before installation.\u003c\/p\u003e\n\u003ch3\u003eInstallation \u0026amp; Calibration\u003c\/h3\u003e\n\u003cp\u003eProfessional installation and an application-appropriate ECU calibration using Injector Dynamics characterization data are required.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCheck applicable federal, state, and local emissions regulations before installing this part on a street-driven vehicle.\u003c\/em\u003e\u003c\/p\u003e","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496576331970,"sku":"IDX1050.18.01.48.14.4","price":820.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/9043b924a72c33b1175585b020b79cf1.jpg?v=1785157426"},{"product_id":"injector-dynamics-id1050-injectors-subaru-brz-fa20-2-0l-11-machined-top-wrx-16b-bottom-adap-qty-4","title":"Injector Dynamics ID1050 Injectors Subaru BRZ\/FA20 2.0L 11 Machined Top WRX-16B Bottom Adap (Qty 4)","description":"Injector Dynamics ID1050 Injectors Subaru BRZ\/FA20 2.0L 11 Machined Top WRX-16B Bottom Adap (Qty 4)","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496576397506,"sku":"IDX1050.18.04.36.11.4","price":600.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/63b96152ebd7f995b4cd4895fc0fed4c.jpg?v=1785157427"},{"product_id":"injector-dynamics-id1050-injectors-11mm-top-adapter-red-denso-lower-cushions-set-of-4","title":"Injector Dynamics ID1050 Injectors- 11mm Top Adapter (Red)- Denso Lower Cushions (Set Of 4)","description":"Injector Dynamics ID1050 Injectors- 11mm Top Adapter (Red)- Denso Lower Cushions (Set Of 4)","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496576463042,"sku":"IDX1050.19.01.48.11.4","price":600.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/4492d11e0462b05c13b8cbfc5158ef2f.jpg?v=1785157428"},{"product_id":"injector-dynamics-id1050x-05-lotus-elise-2zz-ge-11mm-blue-adaptor-top-injectors-set-of-4","title":"Injector Dynamics ID1050X 05+ Lotus Elise (2ZZ-GE) 11mm (Blue) Adaptor Top Injectors (Set of 4)","description":"Injector Dynamics ID1050X 05+ Lotus Elise (2ZZ-GE) 11mm (Blue) Adaptor Top Injectors (Set of 4)","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496576921794,"sku":"IDX1050.30.01.60.11.4","price":656.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/cbcd0396-25a2-46a0-a89d-a015a5043dc8-800_a6fb6832-ebde-441e-b048-4e3ec20b2de2.jpg?v=1785157428"},{"product_id":"injector-dynamics-id1050x-fuel-injectors-34mm-length-14mm-top-o-ring-14mm-lower-o-ring-set-of-4","title":"Injector Dynamics ID1050X Fuel Injectors 34mm Length 14mm Top O-Ring 14mm Lower O-Ring (Set of 4)","description":"Injector Dynamics ID1050X Fuel Injectors 34mm Length 14mm Top O-Ring 14mm Lower O-Ring (Set of 4)","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496577183938,"sku":"IDX1050.34.14.14.4","price":591.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/ca0ed76387444350c2c6d1c5a70c2cc1.jpg?v=1785157433"},{"product_id":"injector-dynamics-id1050x-injectors-48mm-length-mach-top-to-11mm-denso-low-cushion-set-of-4","title":"Injector Dynamics ID1050X Injectors - 48mm Length - Mach Top to 11mm - Denso Low Cushion (Set of 4)","description":"Injector Dynamics ID1050X Injectors - 48mm Length - Mach Top to 11mm - Denso Low Cushion (Set of 4)","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496577773762,"sku":"IDX1050.48.11.D.4","price":600.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/dd8b1c54467bccc599dda6fab9fef555.jpg?v=1785157441"},{"product_id":"injector-dynamics-id1050x-injectors-11mm-red-adaptors-s2k-lower-set-of-4","title":"Injector Dynamics ID1050X Injectors 11mm (Red) Adaptors S2K Lower (Set of 4)","description":"Injector Dynamics ID1050X Injectors 11mm (Red) Adaptors S2K Lower (Set of 4)","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496577904834,"sku":"IDX1050.48.11.F20.4","price":600.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/cbcd0396-25a2-46a0-a89d-a015a5043dc8-800_047f619a-fdfa-4e55-b99e-19e6c13ae258.jpg?v=1785157442"},{"product_id":"injector-dynamics-id1050x-injectors-wrx-16b-bottom-adaptors-11mm-red-adaptors-set-of-4","title":"Injector Dynamics ID1050-XDS Fuel Injectors for Subaru WRX 2002-2014 \u0026 STI 2007-2020 (Set of 4)","description":"\u003cp\u003eThe Injector Dynamics ID1050-XDS is a motorsport-grade injector developed with Bosch Motorsport. This set of four, manufacturer part number 1050.48.11.WRX.4, is the top-feed port-fuel-injection (PFI) configuration Injector Dynamics lists for the 2002–2014 Subaru WRX and 2007–2020 STI. It includes 11 mm red top adapters and WRX-16B bottom adapters. “Direct fit” refers to the listed mechanical rail and adapter configuration; ECU calibration is still required.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNominal flow rate: 1065 cc\/min at 3.0 bar (43.5 psi), rated with gasoline at 52°C (125°F)\u003c\/li\u003e\n\u003cli\u003eMaximum differential fuel pressure: 10.0 bar (145.0 psi)\u003c\/li\u003e\n\u003cli\u003eBody length: 48 mm\u003c\/li\u003e\n\u003cli\u003eTop: 11 mm red top adapters included\u003c\/li\u003e\n\u003cli\u003eBottom: WRX-16B bottom adapters included\u003c\/li\u003e\n\u003cli\u003eInjection architecture: top-feed port fuel injection (PFI)\u003c\/li\u003e\n\u003cli\u003eElectrical: high impedance; USCAR connector; new mating connector supplied by Injector Dynamics\u003c\/li\u003e\n\u003cli\u003eFuel compatibility per Injector Dynamics: compatible with all known fuels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eListed by Injector Dynamics under part number 1050.48.11.WRX.4 for Subaru WRX (2002–2014), STI (2007–2020), and Legacy GT \/ Forester XT (2007–2011). \u003cstrong\u003eVerify compatibility using manufacturer part number 1050.48.11.WRX.4 before ordering.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eQuantity\u003c\/h3\u003e\n\u003cp\u003eSold as a set of four (4) injectors.\u003c\/p\u003e\n\u003ch3\u003eInstallation \u0026amp; Calibration\u003c\/h3\u003e\n\u003cp\u003eProfessional installation and an application-appropriate ECU calibration using Injector Dynamics characterization data are required.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCheck applicable federal, state, and local emissions regulations before installing this part on a street-driven vehicle.\u003c\/em\u003e\u003c\/p\u003e","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496578166978,"sku":"IDX1050.48.11.WRX.4","price":600.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/4d2f5a7d733655b3da24d924f58c454d.jpg?v=1785157444"},{"product_id":"injector-dynamics-id1050x-injectors-14mm-grey-adaptor-top-set-of-4","title":"Injector Dynamics ID1050X Injectors 14mm (Grey) Adaptor Top (Set of 4)","description":"Injector Dynamics ID1050X Injectors 14mm (Grey) Adaptor Top (Set of 4)","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496578494658,"sku":"IDX1050.48.14.14.4","price":600.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/887fffaf38d43b00fbe35b77cdfead2d.jpg?v=1785157450"},{"product_id":"injector-dynamics-id1050x-injectors-14mm-grey-adaptor-bottom-set-of-4","title":"Injector Dynamics ID1050X Injectors 14mm (Grey) Adaptor Bottom (Set of 4)","description":"Injector Dynamics ID1050X Injectors 14mm (Grey) Adaptor Bottom (Set of 4)","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496578822338,"sku":"IDX1050.48.14.14B.4","price":600.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/cbcd0396-25a2-46a0-a89d-a015a5043dc8-800_20d0474d-00d8-4644-9093-8b415ee3c952.jpg?v=1785157454"},{"product_id":"injector-dynamics-id1050x-injectors-11mm-blue-adaptors-set-of-4","title":"Injector Dynamics ID1050X Injectors 11mm (Blue) Adaptors (Set of 4)","description":"Injector Dynamics ID1050X Injectors 11mm (Blue) Adaptors (Set of 4)","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496579444930,"sku":"IDX1050.60.11.14.4","price":600.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/167c7b416df387d81e657b2692844c67.jpg?v=1785157462"},{"product_id":"injector-dynamics-id1050x-injectors-11mm-blue-adaptor-tops-denso-lower-set-of-4","title":"Injector Dynamics ID1050X Injectors 11mm (Blue) Adaptor Tops Denso Lower (Set of 4)","description":"Injector Dynamics ID1050X Injectors 11mm (Blue) Adaptor Tops Denso Lower (Set of 4)","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496579772610,"sku":"IDX1050.60.11.D.4","price":600.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/83baa8e51bec6098d63596bfd2af4cbe.jpg?v=1785157466"},{"product_id":"injector-dynamics-id1050x-injectors-14mm-purple-top-set-of-4","title":"Injector Dynamics ID1050X Injectors 14mm (Purple) Top (Set of 4)","description":"Injector Dynamics ID1050X Injectors 14mm (Purple) Top (Set of 4)","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496580165826,"sku":"IDX1050.60.14.14.4","price":600.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/67fc6cf1ce21688bceb3a11f0f36d0f3.jpg?v=1785157470"},{"product_id":"injector-dynamics-1050x-injectors-14mm-grey-adaptor-top-silver-bottom-adapter-set-of-4","title":"Injector Dynamics 1050X Injectors 14mm (Grey) Adaptor Top - (Silver) Bottom Adapter (Set of 4)","description":"Injector Dynamics 1050X Injectors 14mm (Grey) Adaptor Top - (Silver) Bottom Adapter (Set of 4)","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496580460738,"sku":"IDX1050.60.14.14B.4","price":623.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/391559bdc3266950474ecae7844c2b6d.jpg?v=1785157473"},{"product_id":"injector-dynamics-id1300-mazda-mazdaspeed-miata-1300cc-injectors-set-of-4","title":"Injector Dynamics ID1300 Mazda Mazdaspeed Miata 1300cc Injectors (Set of 4)","description":"Injector Dynamics ID1300 Mazda Mazdaspeed Miata 1300cc Injectors (Set of 4)","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496580821186,"sku":"IDX1300.11.02.60.11.4","price":1039.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/caa7b37e-1de7-4d65-8528-12b36103557a-800.jpg?v=1785157480"},{"product_id":"injector-dynamics-id1300-subaru-sti-04-06-1300cc-injectors-top-feed-conversion-kit-set-of-4","title":"Injector Dynamics ID1300 Subaru STi (04-06) 1300cc Injectors Top Feed Conversion Kit (Set of 4)","description":"Injector Dynamics ID1300 Subaru STi (04-06) 1300cc Injectors Top Feed Conversion Kit (Set of 4)","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496581542082,"sku":"IDX1300.18.01.48.14.4","price":1258.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/caa7b37e-1de7-4d65-8528-12b36103557a-800_667c29a5-0d73-4b95-ac51-28e39e7a6a63.jpg?v=1785157483"},{"product_id":"injector-dynamics-id1300-subaru-brz-2013-1300cc-injectors-set-of-4","title":"Injector Dynamics ID1300 Subaru BRZ (2013+) 1300cc Injectors (Set of 4)","description":"Injector Dynamics ID1300 Subaru BRZ (2013+) 1300cc Injectors (Set of 4)","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496581607618,"sku":"IDX1300.18.04.36.11.4","price":1039.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/caa7b37e-1de7-4d65-8528-12b36103557a-800_fcfa292e-a2ef-459f-a95a-c46d22ae150d.jpg?v=1785157484"},{"product_id":"injector-dynamics-1340cc-injector-34mm-length-no-adaptor-top-14mm-up-o-ring-14mm-low-o-ring-qty-4","title":"Injector Dynamics 1340cc Injector 34mm Length No Adaptor Top 14mm Up O-Ring \/ 14mm Low O-Ring Qty 4","description":"Injector Dynamics 1340cc Injector 34mm Length No Adaptor Top 14mm Up O-Ring \/ 14mm Low O-Ring Qty 4","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496582000834,"sku":"IDX1300.34.14.14.4","price":1030.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/ca0ed76387444350c2c6d1c5a70c2cc1_dd93a0e1-dade-477e-b5da-36985d8f9755.jpg?v=1785157489"},{"product_id":"injector-dynamics-1340cc-injectors-48mm-length-11mm-red-top-s2000-lower-config-set-of-4","title":"Injector Dynamics 1340cc Injectors - 48mm Length - 11mm Red Top - S2000 Lower Config (Set of 4)","description":"Injector Dynamics 1340cc Injectors - 48mm Length - 11mm Red Top - S2000 Lower Config (Set of 4)","brand":"Injector Dynamics","offers":[{"title":"Default Title","offer_id":48496582623426,"sku":"IDX1300.48.11.F20.4","price":1039.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/2026\/1826\/files\/643a4a05eccb40126a8246b807e55afa.jpg?v=1785157497"},{"product_id":"injector-dynamics-1340cc-injectors-48mm-length-11mm-gold-top-denso-and-204-low-cushion-set-of-4","title":"Injector Dynamics ID1300-XDS Fuel Injectors for Subaru WRX 2002-2014 \u0026 STI 2007-2020 (Set of 4)","description":"\u003cp\u003eThe Injector Dynamics ID1300-XDS is a high-flow injector developed in partnership with Bosch Motorsport and designed around alternative fuels. This set of four, manufacturer part number 1300.48.11.WRX.4, is the top-feed port-fuel-injection (PFI) configuration Injector Dynamics lists for the 2002–2014 Subaru WRX and 2007–2020 STI. 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