COMPATIBILITY* 2016+ Audi TT* 2014+ Audi S3* 2015+ Audi A3* 2016+ Audi A4* 2014+ Porsche Macan* 2019+ Volkswagen Arteon* 2018+ Volkswagen Atlas* 2015+ Volkswagen Golf* 2014+ Volkswagen Jetta* 16-17 Volkswagen Passat* 14-17 Volkswagen Beetle * Directly compatible with European vehicles ONLY. North American vehicles did not receive port injection from the factory. However, there are many inexpensive ways to convert the OEM system. This information can be found online. FUEL RAIL20-0889 FUEL RAIL, PORT INJECTION, VW EA888Manufactured with A 0.7" large internal bore, the Radium Engineering fuel rail can support all necessary engine power requirements.  PORTS AND FITTINGS The fuel rail end ports are tapped for 8AN ORB. The fuel rail upper center port is tapped for 1/8" NPT. The fuel rail lower center port is tapped for 6AN ORB. Appropriate fittings must be selected based on the specific application. Ample space around the fuel rail port(s) is necessary for larger accessories such as fuel pressure regulators, fuel pressure gauges, and fuel pulse dampers. To verify clearance, the dimensional drawings on the product pages can be used as a reference guide. INJECTORS Like the OEM fuel rails, the injector bores are 14mm ID so factory injectors, or any equivalent aftermarket injector, can be used.  FEATURES-Lightweight aluminum construction-Inner bore diameter: 0.7 inch-Anodized surface finish for wear and corrosion resistance-Can be converted to a pressure regulated return system-No special tools required for installation-Fits under the factory engine cover 20-0889 Includes: 1x EA888 Port Injection Fuel Rail 2x Stainless Screws, M6x 1mm Instruction PDF