ADVANCED PRO PLUS RACING coilovers are a 2-way adjustable coilover system with inverted mono tube dampers made for vehicles with MacPherson strut types only. The system allows you to adjust the rebound and compression damping independently. With an external reservoir, this system provides additional oil capacity to dissipate heat better, which allows you to operate these coilovers for a long period of time. This improves performance & handling due to more stable variations in damping rates during high speed driving and competition. The stainless braided hosing is utilized to connect the external reservoir through the upper mounts; this is ideal to allow for variable mounting locations when the external reservoir is mounted.