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Roush Power Pac - Level 2 (15-17 GT)

AmericanMuscle no longer carries the Roush Power Pac - Level 2 (15-17 GT). Please check out 2015-2018 Mustang Cold Air Intake & Tuner Kits for an updated selection.
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Features & Details

  • Roush Performance Pac - Level 2
  • Increases of over 29 RWHP and 36 ft/lb RWTQ
  • Improves Throttle Response
  • Roush Cold Air Intake Kit w/ Reusable High Flow Dry Air Filter
  • Roush Axle-Back Exhaust - Cut & Clamp Installation
  • Calibration Optimized for 91 Octane Fuel
  • Flashed via a J2534 Interface Tool - A Dealer Service Charge May Apply
  • Optional 3 Year/36,000 Mile Limited Powertrain Warranty Available
  • Fits 2015-2017 Manual and Automatic GT Mustangs
More Horsepower and Torque. Just about every 2015-2017 GT owner wants to get even more power out of their Coyote powered Mustang. It was with these people in mind that Roush developed their Level 2 Performance Pac. Roush has combined their Cold Air Intake, Axle-Back Exhaust and Flash Pack custom tune together into one convenient kit to significantly improve the power and performance of your ride. After installing the Level 2 Performance Pac on your GT Mustang you will see an increase of over 29 Horsepower and 36 ft/lbs of Torque at the rear wheels.

Roush Calibration. Roush engineers developed their dedicated premium fuel calibrations under laboratory conditions to increase the horsepower and torque of your GT across the entire RPM range with their Cold Air Intake and Exhaust installed. The improved throttle mapping of the included Roush tune will also give your Coyote powered Mustang a much more aggressive feel. Roush's calibrations have been optimized for 91 octane fuel, they are compatible with lower octane ratings with reduced power and performance output.

J2534 Interface Tool Required. Just about any dealer can perform this calibration upgrade in under an hour without even breaking a sweat. The Roush Flash Pack Calibration is flashed on to your Mustang's ECU using Roush's RDT software and an industry standard J2534 interface tool. Please note that a dealer service charge may apply.

Cold Air Intake. Roush's Cold Air Intake was engineered using CAD data to eliminate restrictions and to optimize air flow. Injection molded from premium automotive-grade materials, this Cold Air Intake will last a lifetime. The included high-flow dry air filter provides excellent filtration of harmful power robbing particulates. The filter is composed of two layers of wire mesh for durability and is proven to retain its shape even under high airflow. Washable, this dry air filter does not require oiling, saving you time and money.

Straight Forward Installation. The Roush Performance Cold Air Intake Kit is designed to install easily with just basic hand tools. No extra modifications or special tools are required for proper installation. All necessary parts and instructions are included.

Axle-Back Exhaust. Let your 5.0L Coyote engine howl with a Roush Axle-Back Exhaust. This innovative Roush exhaust system features a hollow chambered muffler that results in increased air flow and a unique sound, with no in-cabin "boom" normally found with performance exhaust at cruising speeds. Constructed from mandrel bent 2.5" diameter 304 stainless steel piping for strength and enduring corrosion resistance, this Axle-Back features two stainless steel 4" tips. The 4" tips are finished with a new chrome flashing process that is resistant to discoloration due to exhaust heat.

Cut & Clamp Installation. Installation of the included Roush Axle-Back Exhaust requires cutting and removing the factory muffler assemblies and clamping the new muffler assemblies in their place. Clamps, hardware and installation instructions are provided.

Optional Warranty. An optional 3 Year/36,000 Mile Limited Powertrain Warranty is available through Roush. The optional warranty must be purchased within 30 days of the service installation date. Click here to see more details.

Application. This Roush Level 2 Performance Pac is specifically designed for use on manual and automatic 2015-2017 GT Mustangs equipped with the 5.0L Coyote V8 engine.

Technical Note. This product is not legal for use in California or any other state adopting California emission standards. Not legal for use on pollution controlled motor vehicles; intended for off road use only.

Fitment: 2015 2016 2017 Details

What's in the Box
  • (1) Cold Air Intake
  • (1) Flash Pack Voucher
  • (1) Muffler assembly - Driver Side
  • (1) Muffler assembly - Passenger Side
  • (2) Tips
  • (4) Clamps
Installation Info
Tech Specs
Cold Air Intake Specifications
Year/Model: 2015-2017 GT Filter Placement: Engine Bay
Material: Thermoplastic Finish: Black
Manufacture: Roush Performance Computer Tune Required: Yes - Tune Included

Axle-Back Exhaust Specifications
Piping Material: 304 Stainless Steel Tip Material : 304 Stainless Steel with Chrome Flashing
Piping Size: 2.5" Tip Size: 4"
Muffler Type: Open chambered Fitment: 2015-2017 GT
Will it fit my Mustang?

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9 Questions / 9 Answers

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Will this power pac void any manufacturer, or for certified preowned warranty’s?


  • Usually, the Roush power packs will not void a warranty. But we recommend contacting your dealership to check on the stipulations on your warranty.


Helpful (0)

Roush CAI ? will the heat extractors provide enough blowout to prevent water from getting on the filter in let’s say a rainstorm or car wash?


  • We have not experienced issues with the Cold Air Intake filter in the Roush Power Pac experiencing excessive water exposure via the hood vents.

    Rob D

Helpful (0)

Do you have any dyno numbers for what gains you would get from this?


  • The Level 2 Performance Pac on your GT Mustang will have an increase of over 29 Horsepower and 36 ft/lbs of Torque at the rear wheels.


Helpful (0)

Does this now come with a dongle as Roush now sells it? Which exhaust is this if i were buying it as a single item? Is this the Roush exhaust reviewed as one of AM's top 3 picks?? Thanks


  • At this time we have not heard any updates from Roush that this will include a dongle, as Roush's site also does not display this. The Roush Power Pac will include the Roush Axle-Back Exhaust item # 387039

    Rob D

Helpful (0)

With the tune will I have any problem passing NH State Inspection. With a typical tuner I would just return to stock, but that doesn't seem like an option with this kit.


  • Unfortunately we are unable to lend information as to what will and will not pass inspection. You would need to check with your local ordinances in order to confirm or deny if it will pass.


Helpful (0)

does it come with a tuner to get best results? or do we have to buy a tuner separate?


  • The Roush Power Pack - Level 2 (15-17 GT) will not come with a hand held tuner. However just about any dealer can perform this calibration upgrade in under an hour without even breaking a sweat. The Roush Flash Pack Calibration is flashed on to your Mustang's ECU using Roush's RDT software and an industry standard J2534 interface tool.


Helpful (0)

Customer Reviews (6) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Full Day

Installation Cost:$100-$250

  • Performance Gain 4.8 4.8
  • Fit 4.8 4.8

  • 5/5

    Installation Time: Afternoon

    November 11, 2017

    The sound and pull

    The sound on this system is badass!! It really makes noise rolling down the road for sure. And the pull you get because of the cold air intake is amazing! Definitely worth the money that is for certain!! Love it!! It took me a little while to put in only because I stopped and was bs'ing with my ex wife. Hahaha!


    Year: 2017 Submodel: GT

    Helpful (5)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    September 19, 2017

    First upgrade

    The mufflers sound great! The cold air intake was a learning point! The Dealership removed the insert and re flashed the performance. It was like Night n Day!!! Got a check Eng light Tec said put insert back in?! Was like hitting the brakes!! Still noticeable power dif. Overall very pleased.


    Year: 2016 Submodel: GT

    Helpful (5)

  • 4/5

    Installation Time: Afternoon

    July 01, 2017

    Wake up your 2015 to 2017 GT

    This is a great way to upgrade your exhaust note, especially when combined with an X pipe. System sounds great, nice placement and fit. You also will notice a bump in hp and torque. This system is in between mild and wild, sounds amazing after 4k rpm!


    Year: 2016 Submodel: GT

    Helpful (4)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    May 15, 2017

    Definitely worth it.

    Improve throttle response. Mid to high rpms pulls a lot harder. Raises rev limit to around 7500. A must have if you are wanting some extra horse power ,but want to keep warranty Roush exhaust sounds awesome.


    Year: 2017 Submodel: GT

    Helpful (7)

  • 5/5

    Installation Time: Afternoon

    April 11, 2017

    Roush power pack 2

    I'm very happy with this product. Installed exhaust and intake in about 2 hours taking my time. I had to go to the dealership to get the tune done. Final results are awesome, more horsepower and exhaust sounds great. Definitely woke the motor up!


    Year: 2017 Submodel: GT

    Helpful (7)

  • 5/5

    September 11, 2016


    Decent bang for your buck, highly recommend, I don't see why you wouldn't buy a bundle.


    Year: 2016 Submodel: GT

    Helpful (5)

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