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2021 Mustang Mach 1 Hits The Dyno!

Created by Andrew Perry / 2 min read
Date Created: 12/3/2025
Last Updated: 12/3/2025

See how a 2021 Mach 1 Mustang with long-tube headers, high-flow cats, and a Lund Racing tune stacks up against a stock Mach 1, as we showcase the power gains!

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Viewing this install and using the information shared is subject to the terms set forth here - View the LMR Install Instructions Disclaimer.
If you've been around the gen 3 Coyote Mustangs then you know that they respond well to simple mods. The 2021 Mach 1 Mustang has a set of long tube headers with high flow catalytic converters and a Lund Racing custom tune. In this video, Landan compares the results to a stock Mach 1 to see the power gains with the custom tune and long tube headers. He also discusses some quick information about why making a dyno pull in a gear that is 1:1 (or close to it) provides the most accurate results. Enjoy the video!

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Relative Dyno Information:

  • Year: 2021
  • Mileage: ~51k Miles
  • Gen 3 Coyote Engine
  • Flywheel Rating: 480 HP / 420 TQ
  • Long Tube Headers w/ High Flow Catalytic Converters
  • 10R80 transmission (Multiple pulls were made. 7th gear is 1:1.)
  • 3.55 Rear Gear
  • Rear Wheels: 19" Factory Handling Pack Wheels w/ 315/30/19 Michelin Tires
  • Lund Racing Custom Tune
  • 93 Octane

Dyno Results:

  • 437 Horsepower

  • 385 lb-ft Torque
2021-mustang-mach-1-dyno-run_2884c622.jpg (1920×1080)

About the Video

2021 Mach 1 Mustang Dyno | Do long tube headers & custom tune make power?

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Published on 2025-10-10
If you've been around the gen 3 Coyote Mustangs then you know that they respond well to simple mods. The 2021 Mach 1 Mustang has a set of long tube headers with high flow catalytic converters and a Lund Racing custom tune. In this video, Landan compares the results to a stock Mach 1 to see the power gains with the custom tune and long tube headers. He also discusses some quick information about why making a dyno pull in a gear that is 1:1 (or close to it) provides the most accurate results. Enjoy the video!
Thumbnail image of the author of this article, Andrew Perry.

About the Author

Andrew has been writing content for Late Model Restoration for over 2 years, producing over 50 articles. Over the years, Andrew has owned numerous Mustangs, including a 2007 V6, 2003 GT, 1967 GT, 1994 GT, 1995 GT, 2014 GT (2), 2000 V6 (V8 swapped), 2016 GT/PP, 1988 LX 5.0, and a 2009 GT/CS. Read more...