Challenger 10313 6 inch Stack Adapter Extension The Challenger 10313 is a 6-inch stack adapter extension that provides additional reach so technicians can access factory-specified lift points on trucks, SUVs, and vans without removing running boards, side steps, or other underbody accessories. It uses a tool-free drop-in design that slides into the lift arm after removing the existing screw pad, and it can be combined with the 3-inch adapter (Part 10314) to achieve 3, 6, or 9 inches of total extension. The 10313 is sold as a matched pair for Challenger two-post and inground lifts rated at 10,000 lb to 12,000 lb capacity. Features 6 inches of additional lift arm reach Tool-free drop-in installation Stackable with the 3" adapter (Part 10314) for 3", 6", or 9" total Sold as a matched pair Specifications General Part Number 10313 Extension Height 6" Quantity 2 (sold in pairs) Design Type Drop-in / nesting style Compatibility Compatible Lift Capacity 10,000 - 12,000 lb