The Ultra-lite Race Coilovers are the ultimate in all around performance and handling. It also features the aluminum pillow ball upper mounts and independent ride height and spring preload adjustability. For the serious Motorsports competitor, the Ultra-lite version features aluminum strut housings for an approximate 10% decrease in weight compare to the Race version. It boasts a premium mono-tube design with 40/45mm pistons and15 way dampening adjustability. We have used these coilovers for dual duty, Drag and Autocross setups with great success. With all the adjustment options, it is possible to set up the vehicle to meet all situations and scenarios. Spring rates: Front 8kg/mm, Rear 6Kg/mm.