The Fortin THAR-ONE-MAZ3 T-Harness is a specific accessory designed for the Evo-One Kit, made for Mazda vehicles from 2013 and up. This T-harness is essential for connecting the push-to-start feature in these specific Mazda models. Created by the trusted brand Fortin, this product ensures compatibility and high-quality performance for a seamless audio experience. With this T-harness, users can easily integrate their audio equipment with their vehicle's push-to-start system for enhanced convenience and functionality.