Rock Krawler RK07988K 4.5 in. Front Coil Spring Kit for Jeep Wrangler JLU 392

The Rock Krawler RK07988K is a 4.5-inch front coil spring kit engineered specifically for the Jeep Wrangler JLU (4-door Unlimited) equipped with the heavy-duty 392 V8 engine. This kit addresses the unique weight and geometry demands of the 392 platform, delivering a commanding lift height while maintaining dependable on- and off-road performance.

Rock Krawler's coil springs are engineered with the correct free-length to promote proper off-road articulation, ensuring the springs stay firmly seated in the coil bucket during aggressive trail use. The result is a controlled, predictable response to bumps, rocks, sand, mud, and varied terrain. Lift heights for the 392 platform are measured above the factory-lifted ride height, yielding approximately 1 inch of additional height compared to a same-lift V6 Wrangler Rubicon.

Kit Includes:

• (2) JLU 392 front coil springs — powder-coated black, 4.5 in. lift height
• (2) Front spring pad correction wedges — polyurethane, push-in installation, black

Key Features:

• Designed specifically for the heavier JLU 392 V8 engine platform
• Spring pad correction wedges reduce the factory spring bow for improved geometry
• Powder-coat finish for long-term corrosion resistance
• Bolt-on installation — no cutting or welding required
• Compatible with Rock Krawler full suspension systems or as a standalone coil upgrade
• Backed by Rock Krawler's warranty against manufacturer defects

Whether upgrading an existing suspension system or adding lift to a 392 build, the RK07988K provides the foundation for improved ground clearance and trail-ready performance without sacrificing street manners.