15-23 Ford Mustang V8 5.0L Roush 421839 Single Adjustable Coil Over Suspension Kit

The Roush 421839 Single Adjustable Coilover Suspension Kit is a high-performance upgrade for your Mustang. It lets you customize your ride height and handling, and enhances your driving experience on the road and track.

Top Features:

  • Zinc plated steel coilovers with red powder coated springs (Front)
  • Roush tuned rear shocks
  • Adjustable spring mounts with red powder coated springs (Rear)
  • New ECU calibration with no user adjustments

Vehicle Fitment:

  • 2015-2023 Ford Mustang
  • All engine options
  • Compatible with factory MagneRide suspension
Vendor: Roush
SKU: RSH421839
Availability: 54 In Stock
$ 1,399.00 USD
On-Sale $ 1,399.00 USD
Normally $ 1,399.00 USD
Save $ 0.00
Better hurry, only 54 left in stock.

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UPC: 844764005037
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Roush 421839 Single Adjustable Coilover Suspension Kit

If you are looking for a way to transform your Mustang’s handling and appearance, look no further than the Roush 421839 Single Adjustable Coilover Suspension Kit. This kit combines performance struts and shocks with height adjustable springs to give you the ultimate control and comfort on the road and track. Whether you want to lower your ride height, adjust corner weights, or fine-tune your suspension settings, this kit has you covered. The Roush 421839 Single Adjustable Coilover Suspension Kit is engineered and tested by Roush to achieve proper balance and stability, and rated for over 1.0g lateral acceleration. This kit is also compatible with the factory MagneRide suspension, so you don’t have to sacrifice any of the features of your Mustang.

Key Features:

  • Zinc plated steel coilovers with red powder coated springs (Front)
  • Roush tuned rear shocks
  • Adjustable spring mounts with red powder coated springs (Rear)
  • Front and rear height adjustment spanners
  • New ECU calibration with no user adjustments

Benefits:

  • Dramatic improvement in handling and cornering
  • Maintains high level of ride quality on the street while increasing performance on the track
  • Allows for custom ride height and stance
  • Easy to install and adjust
  • Comes with a 3-year/36,000-mile limited warranty from Roush

Product Specs:

  • Approximate 1.5" drop in front ride height and 1.0" rear drop (ride heights as delivered)
  • Maximum 1.5" drop in front and 2.0" drop in rear (without modification)
  • Fits 2015-2023 Mustang models
  • Color: Silver (coilovers), Red (springs)
  • Material: Steel (coilovers), Alloy (springs)

Install Difficulty Level:

  • Novice
  • Installation time: 3 hours 30 minutes
  • Basic tools required
  • No cutting or welding required
  • Detailed installation instructions included

Vehicle Fitment:

  • 2015-2023 Ford Mustang
  • All engine options
  • Compatible with factory MagneRide suspension

If you have any questions about this product or to report product description inaccuracies, contact the MPT Performance experts at (407) 636-7077 or by email.

Shipping Policy

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  • Free shipping applies only to the contiguous United States. Shipping and handling charges will apply to orders outside the contiguous US, and the buyer is responsible for any duty fees or taxes their home country may charge to import goods.
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Turnaround Times:

  • MPT Tunes have a standard turnaround time of 2-3 business days, beginning once we receive your MPT Tune Form.
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  • Physical items that are in stock at MPT and ordered by 4PM EST will be shipped the same day. Orders placed after 4PM EST will be processed on the following business day.

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MPT Performance Returns and Refund Policy

  • A Return Authorization Number (RA #) is required for all returns. Please contact an MPT Expert to obtain an RA# before sending anything back.
  • MPT tuning charges and license fees are non-refundable. The sale is final once MPT has sent the tune file via email, which applies to both new tune purchases and tune updates.

Returnable Products:

  • Products (other than MPT Tunes) may be returned within 30 days as long as they have not been installed and are in brand new, unused condition with original packaging. Installed products are non-refundable. MPT reserves the right to deny a return if the product shows signs of installation or damage.
  • Vehicle programmers/tuners that have loaded a tune onto a vehicle cannot be returned.

Refund Amounts:

  • Returns postmarked within 15 days of receipt will be refunded the purchase price minus the shipping cost MPT paid.
  • Returns postmarked between 16 and 30 days will be refunded the purchase price minus a 25% restocking fee and the shipping cost.
  • After 30 days, all sales are final.

Non-Refundable Items:

  • Shipping charges and any package insurance are non-refundable. If free shipping was applied to your purchase, the actual shipping cost will be subtracted from your refund.
  • HP Tuners Credits are non-refundable once they’ve been assigned to a device’s serial number, which occurs either during the purchase or upon completing the tune form.
  • Digital products like SCT Tuner Unlocks, HP Tuners Credits, or MPT Tunes cannot be refunded.
  • Decals/Stickers are non-refundable once received by the customer.
Year Make Model Submodel
2015-2023 Ford Mustang EcoBoost
2022-2023 Ford Mustang EcoBoost Premium
2015-2023 Ford Mustang GT
2022-2023 Ford Mustang GT Premium
2022-2023 Ford Mustang Mach 1
2022 Ford Mustang Shelby GT500
2015-2017 Ford Mustang V6

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