This is a dedicated grounding cable for the Subaru Impreza WRX STi (EJ#). Easy and fun DIY installation. Installation from the battery negative terminal to the grounding points (6 locations in the engine compartment) Made using Nishiosaka Electric Wire SKILL's highest-grade OFC grounding cable (8sq) Cable color: Racing Yellow (Racing Blue/Red available, please inquire.) Product contents: Main unit, installation instructions with color photos, tie wraps, and mounting nuts *SKILL original sticker included as a gift (limited quantity) *Optional plus power cable available (torque and response UP) Improved torque, improved response, stable idling, improved fuel efficiency Improved performance of electrical components, improved sound quality of car radio/CD, etc... can be expected. We hope your car runs well... Please install it. Type of parts... Grounding Compatible car manufacturers... Subaru