For those already running Koni Sport Yellows with OEM, Eibach, H&R or other springs, but is looking for a bit more handling performance or simply looking for the option to adjust ride height, HP Autowerks, Inc. has what you need!
This kit converts your Koni Sport Yellows to a true coilover system with linear rate high quality Swift springs. A fully assembled kit will look something like this:
http://www.e90post.com/forums/showpo...96&postcount=1
The kit consists of:
Front threaded sleeves
Spanner wrenches
Front Swift springs(various rates are available)
Front spring upper hats(camber plates are optional at $439)
Rear threaded height adjusters
Rear Swift springs(various rates are available)
Swift thrust sheets/bearings
Price is $975 + freight.