AST Lowering Springs for Ford Mustang S550
TAG Motorsports is pleased to offer the AST Lowering Springs for Ford Mustang S550 for the 2015-2023 Ford Mustang (S550) Fastback and Convertible.
AST Lowering Springs are made from premium high-tensile chromium-silicon wire, hand-picked by AST engineers for quality and consistency. Each spring is cold wound, heat treated to increase hardness and relieve internal stress, then individually shot peened, phosphate treated and powder coated.
Each spring is blocked and computer tested before shipping to reduce settling once installed. Progressive rates on most applications, and compatible with the factory dampers (including electronic dampers where fitted).
AST part numbers: ASTLS-17-043 (Mustang GT 5.0 V8 - 35mm F / 30mm R), ASTLS-17-044 (Mustang EcoBoost 2.3 / V6 3.7 - 35mm F / 30mm R)
Fits: 2015-2023 Ford Mustang (S550) Fastback and Convertible.
| SKU | AST-LS-S550 |
|---|---|
| Brand | AST Suspension |
| Exhaust Tip Size | 90mm |
PROP65 WARNING

PROP 65 WARNING – Products sold by TMS such as lead acid batteries contain lead, which is known to the
state of California to cause cancer and birth defect or other reproductive harm. Safety Data Sheets for
products sold by TMS are available upon request.
For more information go to:
www.p65warnings.ca.gov/fact-sheets/lead-and-lead-compounds
| Many Items Are In-Stock & Ready-To-Ship. Typically Up-to 2-4 Weeks for Items Not In-Stock. |
