"Our Rear Leaf Spring Suspension Kit is designed for a 1979-1995 Toyota Pickup/4Runner. You will get a smooth, quality ride with the serious wheel travel you need for rock crawling. For 4Runners we recommend 1” more lift in a rear spring or rear shackle than the front, due to the inherent sag with 4Runners. This kit is designed as a match for our solid axle swap kit shown above. Kit provides 4", 5", or 6" of overall lift. Please note: Bump stops MUST be used with each leaf spring to prevent spring dearch and ensure proper spring operation. " -Marlin Crawler