Eibach Pro-Kit Lowering Springs Kit. Audi Tt (8N3), Tt Roadster (8N9). For detail vehicle specification see the corresponding table below. 4 springs for front and rear axles. The product images shown are for illustration purposes only and may not be an exact representation of the product. Slide the table for more details. 10.1998 - 06.2006. 09.2005 - 06.2006. 03.2005 - 06.2006. 02.2000 - 06.2006. 10.1999 - 06.2006. The Eibach Pro-Kit is the perfect answer for most frequently-driven street cars. It´s our legendary spring system that dramatically improves both a vehicle´s performance ...