S4 Spring Rates Front/Rear ---------- Stock - 348/292 Eibach - 360/270 Intrax/ARS - 385-500/425 MTM - 460/400 H&R "Street" - 450/450 H&R "Street" Avant-Specific - 450/475 H&R "Ultra" - 600/625 Stasis - 600/700 (will do custom) Vortrag - 650/700