Big Gun shocks are specifically valved for high horsepower rear shock applications. Recommended for applications 1,000-1,500 hp. Both small tire and big tire cars can better control the hit to the tire with this series of shocks. May be mounted shaft down for reduced unsprung weight and easier access to rebound adjuster. 5" stroke is 12" compressed and 16.92" extended to fit a 13.75-14.75" ride height. Includes coil-over hardware. Suggested 10" or 12" tall spring sold separately.