SDI DRPBK-SH40 DU Piston Bushing Conversion Kit for Showa 40mm Shocks

The SDI DRPBK-SH40 is a high-performance DU piston bushing conversion kit designed specifically for Showa 40mm shock absorbers. This precision-engineered upgrade replaces the standard factory wear band with a low-friction DU (Dry-bearing) bushing to dramatically improve suspension performance and consistency.

Key Features:

• Replaces stock wear band with slick DU bushing material
• Greatly reduces internal friction for improved shock movement
• Creates consistent damping characteristics over the life of your suspension oil
• Eliminates the performance loss associated with standard piston rings that wear dramatically in the first 5 hours
• Prevents changes in low-speed damping caused by wear band degradation
• Designed specifically for Showa 40mm shock applications
• Includes replacement o-rings for complete installation

This conversion kit was developed to solve a common problem with standard piston rings: rapid wear during initial break-in that creates significant changes in damping behavior. The DU bushing provides superior friction characteristics and maintains consistent performance throughout the service life of your shock oil, making it an excellent upgrade for motocross and off-road suspension systems.