Out of curiosity, have you ever ridden in an Impreza with springs that stiff?
When Alex did a big TEIN groupbuy ... hmm, early this year? Last year? I'm getting old...
Anyway, a number of folks were put off by the harsh ride of the 7kg/6kg spring rate.
Bassem, who unfortunately seems not to post any more, got his through another source but switched the springs for 5kg/4kg (IIRC) and was much happier.