ISR Pro Series Coilovers - Scion FR-S / Subaru BRZ After Years of Success with the Basic Coilovers ISR Performance has released a higher end line of coilovers providing better dampening control and overall performance. These are a great coilovers for the street and track use. Provides a comfortable ride while improving handling. Features: 32 Way Adjustable Dampening Mono Tube Design Spring Rate: 8K/6K Front Pillowball Upper Camber mounts. ** ISR Pro Coilovers Utilize High End JAPANESE Bearings ** Basic Coilovers were used on our Professional Formula D Drift Cars. Pro's are an upgrade fom the Basicis What’s in the box: 2x Front coilover assembly 2x Rear coilover assembly 1x spanner wrench set 10x Top hat lock nuts ** ** Legal only for use in competition vehicles which may never be registered, licensed, and/or used on public streets or highways; and also for use in other exempted vehicles.