AST Suspension Lowering Springs (30mm/20mm TUV) - 2005-2012 BMW 3 Series 325i/330i/316D/318D/320D Touring (E90/E91) Honda 6R Premium Chassis Code BM/BR/BS

6R Premium Chassis Code BM/BR/BS Adjustable No Drilling Required No Finish Anodized Grade Type Performance Installation Difficulty Moderate Installation Time (hrs) 0

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AST Suspension Lowering Springs (30mm/20mm TUV) - 2005-2012 BMW 3 Series 325i/330i/316D/318D/320D Touring (E90/E91) Honda 6R Premium Chassis Code BM/BR/BSAST Lowering Springs for the 2005 2012 BMW 3 Series (E90 E91) 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.