AST Suspension Lowering Springs (25mm/20mm) - 2014+ BMW 4 Series 418i/420i/428i/430i/418D/420D Gran Coupe (F36) RWD AST Suspension designed the Competition

AST Suspension designed the Competition 3-way adjustable series to fit the 2008-2013 Subaru WRX STI 2

Extended cylinder length and piston stroke

Rear Lowering Rate 2

1985 Volvo 760 GLE (P1)

1984 Volkswagen Jetta

AST Suspension Lowering Springs (25mm/20mm) - 2014+ BMW 4 Series 418i/420i/428i/430i/418D/420D Gran Coupe (F36) RWD AST Suspension designed the CompetitionAST Lowering Springs for the 2014+ BMW 4 Series (F36) 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