JLT Intake + XForce Headers & Custom Tune on a 2021 Ford Mustang 5.0L V8

In today’s video, we’re working on a 2021 Ford Mustang 5.0L V8 and giving it the upgrade package it deserves: a JLT cold air intake, XForce extractors with high-flow cats, and a full custom tune. This Mustang already had a cat-back installed, making it the perfect platform for a proper intake and exhaust combo.

Because the JLT intake is larger than stock, the MAP sensor position and airflow readings change — so we rescaled and recalibrated the ECU to keep everything running safely and smoothly. Once the intake and headers were fitted, we dialed in a tune to optimise airflow, fueling, and response across the entire rev range.

Dyno Results After Tune:
• Power: 345.4 kW @ 140
• Torque: 667.6 Nm @ 140

These gains highlight how well the Coyote responds to bolt-ons and proper calibration. Stronger mid-range, smoother top-end, and a more responsive throttle make this setup a noticeable improvement for daily driving and spirited runs.

If you’re looking to get the most out of your Mustang with safe, reliable tuning and supporting mods, this is exactly the upgrade path you want to consider.

Watch the full video for more.

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