2025 Civic Si Engine Code. But also, the torque curve seems far more linear in the si. Fb4 honda civic engine codes:
The si will have the minor trim changes (bumpers) and the stereo/infotainment update that every 2025 civic gets, but it won’t get any mechanical changes. A cut above the everyday honda civic, the 2025 civic si is an affordable enthusiast’s choice that’s permanently set in sport mode.