Mercury Grand Marquis 4.6 v8 - 239hp 2003 - 2012 Performance Tuning

Unlock the full potential of your Mercury Grand Marquis with Advanced Tuning & Performance, New Zealand’s trusted Mercury tuning specialists.

At Advanced Tuning & Performance, we provide custom ECU tuning for Mercury Grand Marquis 2003 - 2012 4.6 v8 - 239hp that delivers more power, improved torque, and sharper throttle response, all while maintaining reliability and safety. Our team is dedicated to staying at the forefront of vehicle tuning in New Zealand, constantly developing and refining our calibrations to suit local driving conditions and fuel quality.

Every Mercury Grand Marquis tune is developed and tested on our in-house 4WD dyno, ensuring precise results tailored to your specific vehicle. We use a custom tuning approach, so your Grand Marquis performs at its best, perfectly balanced for performance, efficiency, and the New Zealand climate.

Enhance your setup with performance add-ons such as exhaust upgrades, EGR and DPF solutions, pops and bangs, and more. Whether you’re chasing more towing power, smoother drivability, or a sportier sound, we’ve got the right solution.

How it works: Book your Mercury Grand Marquis for a custom tune, drop it off in the morning, and pick it up after work, ready to experience your Mercury without limitations.