| Type | APP TR 2-Way |
| Part No | YS01-SB-ASTR004 |
| Model | IMPREZA WRX |
| Body Style | GDA/GDB/GGA/GGB |
| Year | 02-07 |
| Note | front clevis width = 26mm |
| Front Upper Mount | P/U* |
| Rear Upper Mount | P/U |
| Front Spring Rate (kgs) | 10 |
| Rear Spring Rate (kgs) | 8 |
| Front Strut | Inverted Strut |
| Rear Strut | Inverted Strut |
ADVANCED PRO PLUS is a 2-way coilover system with inverted mono tube dampers made for vehicles with MacPherson strut type only. The system allows you to adjust the rebound and compression damping Shock & Spring Seperately. With an external reservoir, this system provides extra oil capacity to dissipate heat well, which allows you to operate these coilovers for long period and improves performance & handling due to more stable variations in damping rates during the high speed driving. The braided hose is utilised to connect the external reservoir through upper mounts; this is ideal to allow for variable mounting locations when the external reservoir is mounted.
