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reusable K&N Drop In Air Filter
Suitable for street-driven vehicles that benefit from a customizable lowering solution
and reliable brake pad upgrade that supports everyday driving needs while providing improved braking performance and longevity
contributing to quicker throttle response and smoother power transfer
Supports more responsive steering feel
AST 30mm/20mm F&R Lowering Springs | Audi A4 2001-08 Avant (ASTLS-14-157) Exclusive - 2021-2024 BMW 4 Series Gran Coupe G26 reusable K&N Drop In AirAST Lowering Springs for the 2001 2008 Audi A4 (8E) 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