VMP will only tune these in select applications so be sure to reach out to your tuning rep or sales rep before purchasing. 60lb injectors with the new USCAR (often referred to as EV6) style connector. This is the correct connector for 07-08 Shelby GT500, 05+ Mustang GT, 05+ Mustang 4.0L V6, 99-04 Mustang 3.8L V6. 1/4"" rail spacers or aftermarket fuel rails required to use these on 05+ Mustang V6 or GT500, due to their short style stock injectors.