I currently have them on my ride,if you do ever track your car,stay away from this coil over,they are a piece of ****!only good for the street.bc Taiwan dun make any spring rate higher than 8kg for the lotus application.
From my other post you could see that I am looking for spring as those spec were give by bc to source on my own.
In short they support most Japanese make,they have variable spring rate to support but not for lotus,unless this us reseller have their own source of spring for our application.
If I can't get any better spring I will have to look over to nitrons or ohlins.
Comment is base on my personal experience,ultimately you guy have to decide if it's worth it