2015-17 Mustang Roush Ecoboost Power Pack - Level 1 by Roush

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  • Roush Mustang Ecoboost Power Pack - Level 1 (15-17) 421990
  • Roush Mustang Ecoboost Power Pack - Level 1 (15-17) 421990
Roush Mustang Ecoboost Power Pack - Level 1 (15-17) 421990
  • Roush Mustang Ecoboost Power Pack - Level 1 (15-17) 421990
  • Roush Mustang Ecoboost Power Pack - Level 1 (15-17) 421990

Add up to 51HP & 45ft-lb or torque to your 2015-2017 Ford Mustang Ecoboost with this Roush Performance level 1 power pack!

Item #RSH-421990
MPN# 421990

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  • 75% Less Intake Restriction
  • Improved Throttle Mapping
  • Gain up to 51 RWHP & 45 lb-ft RWTQ


  • Roush High Flow Cold Air Kit
  • Optimized for 91 Octane Fuel
  • ROUSH Exclusive Calibration

What's in the Box

  • (1) Roush Cold Air Intake
  • (1) Flash Voucher Card

Made in the USA

Product Description

Roush Ecoboost Level 1 Power Pack
One of the quickest ways to add more horsepower and torque to your 2015-17 Mustang is with a proper tune and cold air intake. The Roush Performance Level 1 power pack for the Ecoboost can add an additional 51 rear wheel horsepower and 45 pound feet of torque! This Roush Level 1 Power Pack will not only increase horsepower and torque, but it will also add premium fuel calibration and throttle mapping to add a sporty feel starting at idle. This combines to provide performance and drive ability gains through out the entire power band!

Roush Cold Air Kit
The Roush cold air intake kit has been fully tested and calibrated to work seamlessly with the performance ECU reflash. The S550 Roush cold air is CAD designed to maximize available underhood space. Roush injection molds the intake from premium automotive-grade materials for long life. With a 75% lower intake restriction over stock, you will never need to upgrade your intake no matter what mods you plan to do in the future.

-Optional warranty must be purchased within 30 days of service installation date.
-Horsepower and torque improvements shown were completed by Roush. Individual results may vary.

-Fits 2015-2017 Ford Mustang Ecoboost

ROUSH® Limited Warranty - Click Here

Product Videos

How To Use Roush Power Pack Dongle (2015-2017 Ecoboost, GT)

Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!

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Vehicle Applications

Ford Mustang - 2015 (15) - 2016 (16) - 2017 (17)

About This Brand

Roush - The Art of Performance Engineering
ROUSH Performance is the first specialty-vehicle company to combine race-proven technologies with advanced automotive engineering. The result, a unique mix of street car and race car...Is a ROUSH car. Or more specifically, a ROUSH Mustang or F-150 pickup with styling, performance, and handling characteristics derived from the racetrack and modified for street legal usage. The vehicles and components produced by ROUSH Performance are imprinted with Jack Roush's vision, passion for performance, and commitment to excellence. He personally approves the design, engineering, fit, finish and overall performance of each package, ensuring that his personal standards are met prior to production and product release. Many of these products are designed by the same engineering group that has helped Roush Racing become the winningest Ford racing team in history.

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