The car seems to bottom out over the REAR suspension particularly at slow/crawls speeds (especially over speed bumps). Car does not sag in the back or anything though.

At highway speeds there is no bottoming out problem (unless I've got at least 3 people in the car) but given that the car is lowered I guess this is natural?

I bought the car with the Sprint Springs already in it, and it did'nt seem to have this problem at first but has slowly developed. Within the last year I've replaced the DeCarbons with Bilstein HDs and done some other stuff (see sig).

Any Ideas?
Thanks.

 

Im assuming the bumpstops in the rear are too long for your lowered suspension....I would suggest getting shorter ones