2.5in C/O Kit Bilstein 7in

The 2.5in C/O Kit Bilstein 7in coil-over kit from ALLSTAR PERFORMANCE is purpose-built for suspension tuning on circle-track racing vehicles and high-performance street applications. Coil-over kits allow drivers to adjust ride height and spring preload independently, enabling precise chassis geometry optimization for improved handling balance and cornering performance. This kit pairs a 2.5-inch ID spring with a professional-grade Bilstein shock absorber, delivering the dampening control and reliability demanded by competitors and enthusiasts who require adjustability without compromise.

At the core of this assembly is the 7-inch aluminum sleeve, black anodized for corrosion resistance and durability in harsh racing environments. The kit features a 2-inch smooth-body shock—a proven design that reduces friction and wear while maintaining consistent performance through repeated compression and extension cycles. The 2.5-inch coil spring ID integrates seamlessly with the shock body, ensuring proper seating and eliminating binding during full articulation. Bilstein's engineering provides velocity-sensitive damping, meaning the shock responds intelligently to both small track bumps and large impact events, critical for maintaining tire contact and predictable handling on every surface.

This coil-over kit suits circle-track racers, road-course competitors, and street performance builders seeking a bolt-on adjustment platform that doesn't require extensive fabrication. The compact design—measuring 4.3 x 3.5 x 7.7 inches and weighing just 1.31 lbs per unit—makes installation straightforward on most double-A-arm and independent suspension geometries. Verify compatibility with your vehicle's suspension mounting points and ride-height requirements before purchase. Properly valved Bilstein shocks and the adjustable spring platform work together to dial in precisely the stiffness and height your chassis demands.