Product Description
USA Standard 4340 Chrome-Moly axle kit for '79-'87 GM truck & Blazer, GM 8.5", 30 spline w/Super Joints- 30 spline inner and 19 spline outer
- Fits GM 8.5" in 1979-1987 GM 1/2 ton
- Includes inner and outer 4340 Chromoly axles and Yukon Super Joints