2015-2017 Mustang ROUSH 2.3L EcoBoost I4 Flash Pack 421989

Roush Performance Flash Packs for the 2015-2017 2.3L Ecoboost Mustangs, add an exceptional 42 RWHP and 35 lb-ft. of torque to the stock 2.3L Ecoboost engine. An optional 3-year/36,000-mile limited powertrain warranty gives you the confidence to crank up the power.

Roush calibration engineers have extensive OEM calibration experience and sweat the details to ensure strong performance without sacrificing driveability. Hundreds of hours spent in the lab and on the dyno, testing and validating our calibrations, set our Flash Pack calibrations apart from guesswork tuning.

In addition to improved horsepower and torque, improved boost and throttle mapping lend a sporty feel right off idle to provide amazing driveability improvements all through the power band.

Roush Flash Packs are programmed easily into the ECU via industry standard J2534 reflash interfaces with our free Roush Diagnostic Tool, (RDT), utility. An experienced DIY’er and nearly any dealer can perform the calibration upgrade in under an hour without getting their hands dirty.

Product Features
Increased engine performance of over:42 RWHP and 35 lb-ft RWTQ
Roush exclusive Ecoboost calibration developed exclusively for Flash Pack applications.
Improved boost targeting adds increased torque and horsepower across the entire RPM range
Improved throttle mapping lends a sporty feel to the Ecoboost Mustang
Calibration optimized for 91 octane fuel, (compatible with lower octane with reduced power)
Overboost mode allows for aggressive midrange passing power
Fully developed calibrations by Roush engineers under laboratory conditions
Optional 3-year/36,000-mile limited powertrain warranty
Calibration is flashed using free Roush RDT software using industry standard J2534 interface tools. (Note: a dealer service charge may apply)
2015+ Ford Mustang w/2.3L-I4 EcoBoost (All)
Flash Pack Voucher
Optional warranty must be purchased within 30 days of service installation date. (See Roush warranty document 15PP-336PW-AA for complete details)
Not approved for sale in California or states that require California E.O.#

Roush Performance has long been known as the leading tuning for the Ford Mustang. Anytime you purchase a Roush product you can rest assured that product is built to the highest possibly specifications for your 2015-2017 Ford Mustang.

No discounts can be taken on Roush products. The price shown in our lowest price available.

 Fitment: 2015, 2016, 2017 Ford Mustang S550