Here are the specs.
This is for 07+ EX and BC part number is v13. The coilover type are the BR-RS Extreme which is a decent drop.
Front spring rate is 12 Kg/mm
Rear spring rate is 10Kg/mm
The cost for these new was about $1,100 shipped. I will take almost half of that $700, you pay shipping which i bet will be at least $30 (not sure though).


Example of what the drop could look like.

