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Lund Racing 1 Custom Tune (18-20 GT)

Item 406589
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    Review & Installation Video

    Product Information

    Features, Description, Reviews, Q&A, Specs & Installation


    • One Custom File from Lund Racing
    • Improves Power and Overall Performance
    • Guaranteed Maximum, Safe and Reliable Power
    • See the Real Value of Your Mods!
    • For Use with Lund Racing nGauge and SCT Tuners (Not Included)
    • Designed for Stock/Basic Bolt-on Modifications or Aftermarket Intake Manifold
    • Requires 91-93 Octane or E85
    • Will Not Ship To California
    • Works on 2018-2020 GT and Bullitt Mustang Models


    Power and Performance. Improve the power and performance of your 2018-2020 GT Mustang with a Lund Racing Custom Tune File. When your Mustang rolled off the assembly line, Ford programmed it to cater to the needs of the daily driver, not the performance enthusiast who adds aftermarket bolt-on modifications in the search for more power. So, if your Mustang is bone stock or if you have added a cold air intake, throttle body, exhaust or other bolt-on performance upgrades or running a Boss 302, Cobra Jet or GT350 intake manifold, you'll need a Lund Racing custom tune to see the full power potential that these aftermarket mods can make.

    One Custom Lund Racing Tune File. This dyno-tested custom tune file that is written specifically for your Mustang and your particular modifications by a Lund Racing calibrator. By optimizing the air/fuel ratio, adjusting ignition timing and tweaking cam timing, a Lund Racing Custom Tune will squeeze out the extra power Ford left on the table. This tune requires the use of 91-93 octane fuel or E85.

    Free Tune Revisions. Lund Racing will provide tuning revisions for minor modifications free of charge for up to 3 months after you’ve received your initial tune. Changes to your air intake, throttle body, exhaust, gears are all considered minor modifications. The countdown starts from the time you receive the tune(s), which may be up to 7-10 business days following your order.

    Device Compatibility. This Lund Racing Custom Tune File is only compatible with the nGauge tuning device and the SCT X4, REV-X or BDX (not included).

    Will Not Ship To California. Due to state regulations, this product cannot be shipped to addresses in the state of California. Lund Racing will not write or provide custom tune files for residents of California.

    Application. This Lund Racing Custom Tune File is specifically designed for 2018-2020 GT and Bullitt Mustang models equipped with the naturally aspirated 5.0L V8 engine. Aftermarket camshafts, aftermarket and/or ported Heads are not supported with this tune.

    Application Notes. For Mustangs running pump gas with basic bolt-on modifications, see part# 405902. For Mustangs running E85 with basic bolt-on modifications, see part# 405903. For Mustangs running pump gas and an aftermarket intake manifold, see part# 405904. For Mustangs running E85 and an aftermarket intake manifold, see part# 405905.

    **Please Note: The custom tune files will be emailed directly to the end user within 4 business days from Lund Racing. Submit your Mustang's Info Here

    Fitment: 2018 2019 2020 Details

    MPN# 405902




    CA Residents: WARNING: Cancer and Reproductive Harm -


    Customer Reviews (2)

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    Ratings Summary

    3 out of 5 overall rating from 2 customers

    Installation Time: Less than 1 Hour

    • October 11, 2019

      1 2019 GT - NoahS


      It has been 2 weeks and they stil can't fix a rev hang problem I have. My car is on e85 with headers and an intake. I have been going back and fourth with them and they kept telling me that Im wrong and its "all in my head" They told me the log is perfect and im wrong. Later that day I realized my car was reading 9.8 AFR on Decel when it's supposed to read 20. when i decel the car runs rich like im still on the throttle. I sentthem a video so they realized and sent me a new tune and it still wasnt fixed. Noiw they deny that they made a mistake and that im still wrong. Seriously just get a dyno tune or go somewhere else. terrble customer support. I wasted 450$ and the car doesnt even pull.

      Helpful (0)
    • January 19, 2019

      5 2018 GT - Adalberto Installation Time: Less than 1 Hour


      I felt a higher diffrence for this tune. Throttle response is crazy. Tires spin all day

      Helpful (3)

    Questions & Answers (1 answers)

    1 Top Rated Question

    can lund provide a flex fuel tune rather than a straight e85 or straight 93 tune?

    • Unfortunately we do not offer a Flex Fuel tune from them. We would recommend contacting Lund directly to see if that is something they would be able to do.

    Helpful (0)
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    Installation & What's in the Box

    Installation Info

    What's in the Box

    • (1) Lund Racing Custom Tune File - via email

    Will It Fit My Mustang

    • Bullitt - 19, 20
    • GT - 18, 19, 20

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