AST Suspension Lowering Springs (30mm/30mm) - 2014+ BMW M4 Competition Cabriolet (F83) 328i xDrive shaped and case hardened washers

shaped and case hardened washers on your 1975-1991 Ford F-350 Custom (F-Series) to suit the rigors wear and tear loads on sway bar link washers

Whiteline Caster Kits on your 2009 Chevrolet HHR SS Panel (Delta) are designed to improve cornering grip and vehicle straight line stability through increased static caster and dynamic negative camber gain

Touring Chassis Code BC/BF/BD/BG Bushing Material Polyurethane Grade Type Performance Installation Difficulty Easy Installation Time (hrs) 1 Kit Contents 2 Links

2019 BMW 230i (F22)

2009 Mazda 5 Touring (CR)

AST Suspension Lowering Springs (30mm/30mm) - 2014+ BMW M4 Competition Cabriolet (F83) 328i xDrive shaped and case hardened washersAST Lowering Springs for the 2014+ BMW M4 (F83) 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