u/saulfp777

I documented my full conversion of a 2024 Mustang GT S650 that did not originally have Active Exhaust into a fully functional OEM-style Active Exhaust setup.
The project included the physical retrofit, OEM Ford/FoMoCo mufflers and valve actuators, wiring, quad-tip exhaust adaptation, FORScan configuration of the IPC/APIM/ACM modules, and final functional testing.
I also compared the stock 2024 Mustang GT calibration against a stock 2024 Dark Horse calibration in HP Tuners. Rather than flashing the complete Dark Horse file, I kept the Mustang GT calibration as the base and transferred the relevant calibration tables while preserving the GT vehicle identity and calibration structure.
The comparison included Active Exhaust strategy, airflow/speed density, fuel, spark, torque model, transmission-related tables, and other calibration differences. After the table transfer, the comparison file showed only two remaining transmission downshift torque-modulation differences.
I then road-tested the car and recorded an HP Tuners datalog to validate the result. The Active Exhaust became fully operational, the car ran without a Check Engine light during testing, and the datalog was reviewed for RPM, commanded and measured lambda, direct-injection fuel pressure, knock retard, temperatures, and other key parameters.
I put the complete project into a technical PDF with the hardware used, part numbers, before-and-after screenshots, FORScan changes, HP Tuners comparisons, datalog graphs, and the documented results.
This is being shared strictly as independent educational and technical documentation. It is not affiliated with or endorsed by Ford, HP Tuners, or FORScan, and anyone attempting a similar retrofit should verify the correct wiring, module configuration, calibration compatibility, emissions requirements, and safety considerations for their own vehicle.

https://drive.google.com/file/d/1euSsRCIRrgC-Lv6xSQtL8kOiQqj7xky3/view?usp=drivesdk