lowered by 30mm eibach'sWell possibly. But the theory is the B4 has standard damper travel and is therefore not best matched to a reduced height Sport spring.
Are your springs standard or lowered?
but soon to be 45/30mm eibachs
you don't have to run shorter shocks with a 30mm drop
i have lowered dozens of cars, many of them on standard shocks to no i'll effect