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2013 Audi TT Base (8J)
5 kg/mm Spring Rates - Rear 5 kg/mm (Separated shock and spring) Super Low Drop Optional Yes Swift Springs Optional Yes Custom Spring Rates Optional Yes Custom Spring Rates - Rear Option Note Rear spring rates can not be changed on some kits
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AST Suspension Lowering Springs (30mm/45mm TUV) - 2014+ Mercedes-Benz Vito RWD (W447) 1961 2013 Audi TT Base (8J)AST Lowering Springs for the 2014+ Mercedes Benz Vito (W447) 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.
