AST 35mm F&R Lowering Springs | Honda Civic Si (AF/AG/AH/AL/AS) (ASTLS-14-895)AST 1984 1987 Honda Civic Si (AF AG AH AL AS) Lowering Springs 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 1984 1987 Honda Civic Si lowering spring is then individually shot peened, phosphate treated and then powder coated to