Nostrum K-ITI 1000CC fuel injectors for Subaru. Targeted Spray pattern for EJ engines. Fits 02 to 2014 WRX and 08 to 2019 STI. Compatible with CTT maps, plug and play data is provided. These injectors feature a colliding plate and dual spray pattern engineered for the Subaru EJ engine. NOTE, these injectors are marked for install into specific cylinders. Please read and follow the Diagram from Nostrum!