A must for lowered vehicles: reduced diameter and shorter drives shafts.
These thinner axles will save you a lot of time cutting/notching the chassis to create the required space when driving low. Furthermore, the approximately 10mm length reduction compensates for the angle the drive shaft makes after lowering. This greatly reduces stress on the tripod joints, wheel bearing and gearbox. Furthermore, it allows the vehicle to drop even further.
The German made drive shaft is manufactured from one piece, hence no welded or re-machined part. This combined with its high quality material and heat treatment creates a strong package.
Please note that the left side (driver side for EU & US cars) is only required for extreme low vehicles, e.g. vehicles using air ride.