Description: This kit includes a set of 1/4" plate steel spring shackles, engineered to preserve factory ride quality and reduce driveline vibrations. These heavy duty shackles provide lift height easily and effectively, while their beefy design and powdercoat finish are durable enough to hold up to the elements. Package Include: Rear Spring Shackles x2 Digital Installation Guide x1 Installation time is approximately 1-2 hours Tire Fitment: Maximum Tire Diameter 32" x 10.50 Application for: GMC K1500 88-98 4WD GMC K2500 88-99 6-Lug 4WD GMC Yukon 92-99 4WD GMC K1500 Suburban 92-99 4WD .