I just dont want my car to sound like its going to brake when I hit a bump in the road. I had sport shocks and springs on my VW and the ride was absolutely horrible. im just hoping coils will give me a little better ride. i will not tolerate a ride on my lexus as I had on my vw

 

If you think the 10kg/8kg setup is too stiff, you can always spend about a $100 and get a pair of 6kg springs and put those in the back. Then install the 8kg which used to be in the rear up front giving you a 8kg/6kg setup. This is what Tristan from Circuit Motorsports told me. I haven't received a shipping confirmation yet though. Hopefully I get mine soon.

Honestly, I think the 6kg in the rear would be too soft for a lowered car. I had 4 people including myself in the car yesterday on my 350 and hit the rear bump stops very easily over dips with the stock 4.5kg/5kg suspension.