Triple S Lowering Springs for 2015-2023 Ford Mustang Ecoboost (S550) ISC-TSLS-TURBOPONY

Triple S Suspension

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SKU: ISC-TSLS-TURBOPONY

Triple S Lowering Springs for 2015-2023 Ford Mustang Ecoboost (S550)

Sale price$249.00Regular price $299.00
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Fitment Notes

All fitment information on our website is provided by the manufacturer. It is the customer's responsibility to thoroughly read the product description and confirm fitment before placing an order and proceeding with installation.

Unless specified otherwise, all suspension products are designed for 2WD vehicles only. Any notes or descriptions related to electronic damping systems (EDC, DDS, etc.) apply strictly to vehicle fitment. Aftermarket coilovers are not compatible with OEM electronic damping control systems unless explicitly stated.

*Product images may not represent the actual SKU.

Handling Time

All handling times are estimates and may change at any time.

  • In Stock: 1-2 business days
  • Out of Stock: 3-5 weeks
30-Day Returns

Not quite right? No problem — we offer hassle-free 30-day returns on eligible items. A few exclusions apply.

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Limited Lifetime Warranty

All ISC Suspension coilovers are covered by a Limited Lifetime Warranty that is available to the original purchaser only (non-transferable).

All other ISC Suspension products, with the exception of ISC coilover covers, are covered by a limited 5 year warranty.  ISC coilover covers have a 1 year warranty.

Shafts and internals such as seals, fluids, pillow ball mounts and leaking shocks are covered for 2 years from the original purchase date.  Parts and REBUILD labor are covered under the warranty but shipping is not covered.

Products MUST BE REGISTERED or else this warranty will not be valid and will fall under a 1 year limited warranty ONLY.

In order to register your product with ISC Suspension, please send your original invoice from an authorized ISC dealer to support@iscsuspension-na.com.

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Product Details

Triple S Lowering Springs for the 2015-2023 Ford Mustang Ecoboost (S550) lower your Ford Mustang Ecoboost's center of gravity for a cleaner stance, sharper turn-in, and reduced body roll while keeping daily-driver comfort. Engineered specifically for the 2015-2023 Ford Mustang Ecoboost (S550), these progressive-rate springs deliver an approximate -33mm front and -20mm rear drop — a balanced stance that improves handling without the harshness of an aggressive cut. They are a direct replacement for the factory coils and bolt in without cutting, welding, or other modifications.

Unlike most aftermarket lowering springs, every Triple S application is engineered around the chassis it fits — in this case the Ford Mustang Ecoboost (S550) — so the drop is matched to the factory damper's stroke. That means you keep your OE shocks and avoid the extra cost of replacing dampers just to prevent them from bottoming out. The result is a mild, street-friendly drop that preserves ride quality and extends the life of your factory suspension.

Triple S springs are cold-forged from SAE9254 silicon-chromium alloy by Yang Min Enterprise — an OEM coil-spring manufacturer with over 50 years of experience and ISO 9001, IATF 16949, and ISO 14001 certifications. Cold forging yields higher stress tolerance and tighter rate consistency than hot-forged springs, so each set delivers predictable, repeatable performance for the life of the part. A durable blue powder-coat finish resists chips and corrosion, and every set is backed by a 1-year manufacturer defect warranty.

Kit includes one pair of front springs and one pair of rear springs (4 total) engineered for the 2015-2023 Ford Mustang Ecoboost (S550). Silencer rubbers are included where applicable.

Features

  • Cold-forged SAE9254 silicon-chromium alloy
  • Progressive spring rate design
  • Direct-fit replacement for OE coils — retains factory dampers
  • Includes silencer rubbers on select applications
  • Durable blue powder-coat finish
  • Engineered per-chassis for matched damper stroke
  • 1-year manufacturer defect warranty
Specifications
Part Number ISC-TSLS-TURBOPONY
Part Name Triple S Lowering Springs
Vehicle 2015-2023 Ford Mustang Ecoboost
Chassis Code S550
Front Drop -33mm
Rear Drop -20mm
Spring Type Progressive Rate Lowering Spring
Spring Material SAE9254 Silicon-Chromium Alloy (Cold-Forged)
Finish Blue Powder Coat
Sold In Set of 4 (Front Pair + Rear Pair)
Manufacturer Yang Min Enterprise
Country of Origin Taiwan
Warranty 1-Year Manufacturer Defect

Vehicle Fitment

  • 2015 Ford Mustang Ecoboost (S550)
  • 2016 Ford Mustang Ecoboost (S550)
  • 2017 Ford Mustang Ecoboost (S550)
  • 2018 Ford Mustang Ecoboost (S550)
  • 2019 Ford Mustang Ecoboost (S550)
  • 2020 Ford Mustang Ecoboost (S550)
  • 2021 Ford Mustang Ecoboost (S550)
  • 2022 Ford Mustang Ecoboost (S550)
  • 2023 Ford Mustang Ecoboost (S550)

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