ISC Suspension 06-11 BMW 3 Series E90/E91/E92 N1 Basic Coilovers - Track/RaceSimplified Performance For The Street Enthusiast. The ISC V2 Basic coilover has all the great features of the ISC V2 N1, but has rubber isolated top mounts instead of a camber plate pillowball application in the front. Many street enthusiasts may not need to have adjustable camber plates, so the ISC V2 Basic was made in order to simplify the product and eliminate any feature that may not be used for your average street car that is not going for track