GM 8.875in. 12 Bolt Car 4.10 Up Pro Series Limited Slip For Use With 30 Spline Axles;For Use With 4.10 And Up Gears;Aggressively Preloaded Cone Style Clutch System;Smooth Street Operation; Hardened Spider Gears;4 Year Replacement Warranty CHEVROLET EL CAMINO BASE CUSTOM 1964 1965 1966 1967 1969 1970 1971 1972 3.2L (194) 3.8L (230) 4.1L (250) 4.6L (283) 4.6L (4638cc) 5.3L Chevy Small Block (327) 5.4L Chevy Small Block (327) 5.7L (350) 5L Chevy Small Block (307) 6.5L Chevy Big Block (396) 6.6L Chevy Big Block (402) 6.6L Chevy Small Block (400) 7.4L Chevy Big Block (454) GAS Auburn Gear Auburn Gear GM 8.875 Inch 12 Bolt Car 4.10 Up Pro Series Limited Slip - 542031 542031 Differentials