Skyjacker J40RS Softride Leaf Spring 3.5-4 Inch Lift Single

The Skyjacker J40RS Softride leaf spring delivers 3.5 to 4 inches of lift height with superior ride quality and durability. Engineered specifically for lifted truck and SUV applications, this single leaf spring combines American-made steel construction with advanced manufacturing processes to provide excellent load distribution and extended service life.

Key Features:

• Manufactured from premium American steel for maximum strength and reliability
• Shot-peened construction increases tensile strength and prevents premature failure
• Full-length tapered leaf design distributes loads evenly and reduces stress concentrations
• Bolt-style spring clips eliminate friction and binding for smoother suspension articulation
• Enhanced flexibility at leaf ends maximizes wheel travel and off-road performance
• Provides 3.5 to 4 inches of lift height for aggressive stance and increased ground clearance

The Softride manufacturing process includes high-velocity shot-peening with hardened steel pellets, which compresses the surface of each leaf to dramatically increase tensile strength. This critical step allows the spring to maintain its performance characteristics through maximum wheel travel without sacrificing longevity. The tapered leaf design distributes stress across a larger surface area, preventing the common problem of one leaf digging into adjacent leaves during compression and articulation.