AST Suspension Lowering Springs (40mm/25mm TUV) - 2006-2013 BMW 3 Series 330D/335D Coupe (E90/E92) YMM_2009_2013_BMW_Z4_II_E89 and performance consistency

and performance consistency

Optimized for performance

Constructed from high-quality painted carbon fiber for a lightweight

1 - Bilstein B4 OE Replacement Shock

Porsche 911 GT3 owners who want a durable

AST Suspension Lowering Springs (40mm/25mm TUV) - 2006-2013 BMW 3 Series 330D/335D Coupe (E90/E92) YMM_2009_2013_BMW_Z4_II_E89 and performance consistencyAST Lowering Springs for the 2006 2013 BMW 3 Series (E90 E92) 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.