If anyone is interested, look at a product by the name of RS-R Ran-up. Very expensive product that has never received a negative feedback from multiple forums and tests. RS-R is a Japanese company that specializes in suspension tuning. Here in the USA they are based in California and does a lot of drifting events with their company cars. Here is their website : (
http://rs-r.com/).
If you're in the socal already, they used to give you free samples and free dyno if you drop by their location. email/call to see if they still do that!
btw, i dont work for them, they don't really even distribute the product so you have to order from them directly. cheers!
Have fun guys!