source: H&R, photos: H&R and George Achorn Audi A4 and A5 have always been innovative and stylish vehicles – making them a HUGE hit with enthusiasts. VTF is the acronym for Verstellbar TieferlegungsFedern. Translation, Adjustable Lower Springs. The H&R VTF kit is a special specific Sport Spring designed for the new Audi A4/S4 and A5/S5, they include adjustment collars to fine tune the lowering to your taste. All the parts in the VTF Kits are specifically designed to th...