Speedmaster 170 lbs./in. Spring Rate 12" Coil Over Shock Springs - Black Pair (PCE493.1004.02)

The Speedmaster PCE493.1004.02 coil over shock springs deliver a 170 lbs./in. spring rate in a 12-inch tall form factor, engineered for precision suspension tuning and custom vehicle setups. This pair of black coil over shock springs is designed to work with coil over suspension systems where specific spring rates are critical to ride quality, handling, and load support. The grounded spring rate specification allows builders and enthusiasts to match these springs to their exact suspension geometry and performance requirements.

Coil over shock springs are essential components in custom and performance vehicle applications where independent spring rate selection is necessary. These 12-inch springs integrate with coil over dampers to create a tunable suspension package. The 170 lbs./in. rate makes this pair suitable for mid-range load applications and personalized suspension geometry. Whether you're building a custom suspension, replacing worn springs, or fine-tuning existing coil over setups, having matched spring pairs with verified specifications ensures consistent performance and reliability across your build.

Key Features & Benefits

• 170 lbs./in. Spring Rate: Precisely rated spring constant suitable for mid-range load and performance suspension applications.
• 12-Inch Tall Design: Fits standard coil over shock assemblies and suspension geometry requirements.
• Matched Pair: Two springs with consistent spring rate for balanced suspension performance.
• Black Powder Coat Finish: Durable finish resists corrosion and oxidation in automotive environments.

Specifications

Ideal Applications

• Custom vehicle suspension builds and tuning
• Coil over damper system replacement and upgrades
• Performance and street rod applications
• Suspension geometry and ride height adjustments