AST BMW G21 M340i xDrive Touring Lowering Springs BFCM_M135i (F20/F21) With an OEM-style weave and

With an OEM-style weave and high-gloss finish

200 different replacement air filters for the majority of vehicles on the road

Glue is not included

Ideal for both daily driving and track days

AST BMW G21 M340i xDrive Touring Lowering Springs BFCM_M135i (F20/F21) With an OEM-style weave andGive your BMW G21 M340i xDrive Touring the extra stance it needs with AST lowering springs. AST Lowering Springs 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