Hard to say about the strut, I was without the car for 2 months, before which I hadn't got it on, and I've had it on ever since. Certainly corners nicely, but hates bumps and pot holes, overall i guess I'm pleaed with it.
The kit is a Green Cotton DynaTwist which sounds georgeous on top of the supersprint zaust, had to order and wait 4 weeks for the induction as they are all made to order.