Yukon 4340 Chrome Moly rear axle for GM 10.5″ 14 bolt truck and 11.5″, 30 spline. This is a cut to fit axle which fits 38.2″ to 42.2″ applications. Yukon 4340 Chrome Moly alloy axles offer a strength increase over stock while retaining a low cost. Yukon 4340 Chrome Moly alloy rear axles come with a limited lifetime warranty against manufacturing defects. Please verify bolt pattern on 2011 & later models. This axle has a 3.562″ bolt pattern. Some late model applcaitons use a larger bolt pattern.