SKU: AST-140-100-61 | UPC: astAST-140-100-61
AST Linear Race Springs - 140mm Length x 100 N/mm Rate x 61mm ID - Single
AST Linear Race Springs feature 140mm free length, 100 N/mm spring rate, and 61mm inner diameter in a single unit for precise coilover setups. These springs suit performance vehicles with compatible suspension systems, offering linear response for sharp handling and track stability. Built for demanding race conditions, they maintain shape under load.
Key Features
- 140mm Free Length: Allows exact ride height adjustment in coilover assemblies for balanced street and track performance.
- 100 N/mm Linear Rate: Provides steady force progression for predictable chassis control during high-speed corners.
- 61mm Inner Diameter: Matches common coilover perches for direct fit in AST and similar systems.
- Chrome Silicon Steel Construction: High-tensile material resists fatigue and corrosion in extreme racing environments.
- Shot Peened and Preset: Enhances longevity by reducing stress points and preventing sag over thousands of cycles.
Product Notes
- Sold as single spring for custom setups or replacements.
- Green powder coat finish identifies rate and prevents rust.
- Special order item verify stock before ordering.
Installation Notes
- Professional installation recommended.
- Confirm coilover perch inner diameter is 61mm before install.
- Pair with matching spring seats and rubbers for secure mounting.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | Various | Coilover Equipped | 61mm ID Perch Systems |
| 2005-2012 | Porsche | 987 Boxster | Cayman S |
| 2009-2016 | Porsche | 997 Carrera | GT3 RS |
| 2013-2016 | Porsche | 981 Cayman | S |
| 2008-2013 | BMW | E90 M3 | All |
Why Choose AST?
- Developed for professional motorsport teams worldwide.
- Precision manufacturing ensures consistent load handling.
- European engineering meets FIA and track standards.
Frequently Asked Questions
-
Q: Will this spring fit my coilover kit?
A: Fits systems with 61mm ID perches like AST DP and SS series verify your perch specs for compatibility. -
Q: What material and finish does it have?
A: Made from heat-treated chrome silicon steel shot peened preset and green powder coated for identification and protection. -
Q: What is the warranty coverage?
A: AST provides warranty against defects in materials and workmanship when installed correctly contact support for details.
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Protective cardboard box 6 x 6 x 6 inches
- Weight: 2.2 lbs
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