The Pro Comp ES4000 Toxic Series shock absorber part number 418509 is designed for the rear axle of several classic GM trucks that have a 4 to 7-inch suspension drop. ®
The specific vehicles it is compatible with include:
• Chevrolet C10 model years from 1960 to 1987.
• GMC C1500 model years from 1979 to 1986.
• GMC C15/C1500 pickup model years from 1967 to 1974.
• Chevrolet C20/C30 and GMC C20/C30 trucks model years from 1973 to 1991, for a 4 to 8-inch rear drop. ®
The shock absorber features 10-stage velocity-sensitive valving and is engineered for limited travel