very late update, but only got these on a week ago so let them bed a little and a few long drives since(new topmounts too). as I said I would, am posting how I have found them.
Now the FK ones removed from the car was completely shot, one didnt return if you compress it, the other took in excess of 30/40 seconds and was still slowly increasing after, and they knocked horribly!..rubbish, so my experience of before is pretty bad. The car is also on air, running Airlift performance bags so the ride lower down is softer.
When these went on, they raised the back up a good 10mm or more from aired out, i no longer tuck rim so these are a little longer than the fk street ones.
Before:
After
The b8 Bilsteins was pricey but promised to be good for lower height cars.
Now at normal driving height, nothing silly low just lower than stock with no arch gap, these feel fantastic! the rear is no longer bouncing, pot holes dont thud through the car, feels nearly like a good solid sline again fresh from the show room, the bags keep these soft and make combined a lovely stiff yet predictalby smooth ride, I imagine on springs these would feel much firmer though, the higher my drive height the firmer the ride (bag logic).
Now when i drive low ride height on the motorway which is most of my driving, i drive almost fully tucked, When I am that low, the ride becomes very bouncy, much bouncier than on the old broken shocks, it is pretty unpleaseant, I feel a little reminiscent of sitting in a bouncy lowered saxo. However the solution is the raise the height a bit and the bouncyness is gone and feels lovely and solid again, not a big deal unless you have a car static silly low this might not be so bad, but if you are scene low and wont raise up, then you might feel dizzy after all the bouncing and these might not be for you.
On the country roads these are night and day, omg what a difference, it feels nice, solid and predictable, i dont feel the constant crashyness any more and it doesnt seem to reduce in performance after a good 10 minutes of heavy windy bend thrashing, my old fks got progressively worse on a hard drive untill being stationary a while.
I was very happy after my spirited country drive.
so over all, these are fab with air, just the right level of firm, with springs probably too solid for me but perfect if you like a sporty ride.
If you are VERY silly low these become bouncy and not very nice, but if you are just low (no arch gap) then these at that height feel perfect
