12in x 2.5in x 175# Coil Spring

The 12in x 2.5in x 175# Coil Spring from Chassis Engineering is purpose-built for coil-over suspension systems where tuning spring rate is critical to vehicle dynamics. Whether you're setting up a dedicated track car, street performance build, or competitive autocross platform, this spring delivers the consistent rate control needed for predictable suspension behavior. At 175 pounds per inch, this rate sits in the sweet spot for lightweight to mid-weight vehicles seeking balanced handling without sacrificing ride quality on street applications.

Manufactured from high-grade steel and finished with black powder coat, the 12in x 2.5in x 175# coil spring resists corrosion and maintains dimensional stability under repeated load cycling. The 2.5-inch inner diameter accommodates standard coil-over shock bodies, while the 12-inch free length integrates seamlessly into most adjustable damper kits without requiring custom fabrication. The 175 lb/in spring rate provides sufficient support for load transfer during cornering and braking events while maintaining compliance for bump absorption—a balance that separates quality suspension components from budget alternatives that compromise either comfort or grip.

This spring suits builders upgrading from factory suspension, racers fine-tuning coil-over packages, or mechanics standardizing spring inventory across multiple platform builds. Installation pairs directly with compatible shock absorbers featuring 2.5-inch body tubes; verify your coil-over kit's specifications before ordering. Single-spring purchases work well for staged upgrades or replacement of worn components, though complete suspension refreshes typically require a matched set across all four corners for consistent geometry and handling characteristics.