What is the fine-grained topic of the following text: The new WRX injectors are based on the legendary Bosch EV14 injectors and have been developed with the same commitment to quality, drop-in fitment, and easy tunability that have made the Deatschwerks Subaru injectors the #1 choice of top Subaru tuners around the US and world. Only return the topic.
Deatschwerks Subaru WRX injectors