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The Yukon USA 4340 chrome-moly axle kit for 1979–1987 GM truck and Blazer fronts is specified for GM 8.5" differentials with a 30-spline configuration. Built from high-tensile 4340 chromoly and heat-treated for strength, the kit includes matched inner and outer shafts and ships with 1310 Series u-joints for straightforward replacement of factory components.
USA Standard 4340 Chrome-Moly Axle Kit For 79-87 GM Truck & Blazer / GM 8.5in / 30 Spline
