General description maXpeedingrods B1 series coilovers are designed for Audi TT Mk1 Coupe & Roadster Quattro 4WD (8N) models from 1998 to 2006. These coilovers are ideal for replacing old, worn-out struts while enhancing handling performance. They feature height adjustability and maintain the original equipment (OE) ride quality as much as possible. Technical specifications Front Lowering: 30-85mm (depends on vehicle models) Rear Lowering: 30-70mm (depends on vehicle models) Spring Rate Front: 8 kg/mm (448 lbs/in) Spring Rate Rear: 9 kg/mm (504 lbs/in) Spring Length Front: 170 mm Spring Length Rear: 130 mm Spring Preload advised: 7-10 mm with Front Helper springs Damping: fixed damping Quantity: 2x front coilovers, 2x rear coilovers, 2x C spanners Installation It is recommended that all modifications be installed by licensed mechanics and in compliance with local modification regulations. Ensure all components are tightened to the correct torque specifications, which can be found in