AST Suspension Lowering Springs (35mm/35mm TUV) - 1997-2004 BMW 5 Series 520i/523i/525i/528i/530i/520D/525TDS Touring w/ Air Suspension HA (E39) coilover-sleeves That's the sound you hear

That's the sound you hear when your Sway Bar Links to your 1997-2008 Hyundai Tiburon Base (RD/GK) are not doing their job

1991 BMW 3 Series Allroad 4WD 6CYL Touring (E30)

Sway Bars to your 2008-2009 Ford Mustang Bullitt

1991 Volkswagen Golf Cabrio (MK1/155)

AST Suspension Lowering Springs (35mm/35mm TUV) - 1997-2004 BMW 5 Series 520i/523i/525i/528i/530i/520D/525TDS Touring w/ Air Suspension HA (E39) coilover-sleeves That's the sound you hearAST Lowering Springs for the 1997 2004 BMW 5 Series (E39) 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.