AST Suspension Lowering Springs (55mm/35mm) - 1990-1994 Audi 100 5-6CYL (C4) IS Club Spec (NC) advances and

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AST Suspension Lowering Springs (55mm/35mm) - 1990-1994 Audi 100 5-6CYL (C4) IS Club Spec (NC) advances andAST Lowering Springs for the 1990 1994 Audi 100 (C4) are manufactured from a premium high tensile chromium silicone wire which is handpicked by AST engineers for its quality and metal consistency. Each spring is cold wound and then heat treated to increase hardness and reduce internal stresses present after winding. Each spring is then individually shot peened, phosphate treated and then powder coated to outlast even the life of the vehicle. Features