AST ACU-S6206S 5100 Series 1-Way Coilovers for Impreza WRX GG/GD

Vehicle Fitment

• 2000-2007 Subaru Impreza WRX/STI, GG/GD chassis

Fitment Notes

• Designed to run OEM top mounts; top hats/top mounts not included
• Confirm your specific GG/GD model year and trim against the manufacturer's fitment data before ordering

Features

• Inverted/upside-down technology for a race-proven, extremely strong damper design
• Improves suspension geometry under heavy lateral and braking loads on road and track
• Monotube construction eliminates aeration or foaming for more responsive valving
• Adjustable rebound via a single knob, with 12 distinct positions for fine-tuned feedback
• Adjustable ride height platform for dialing in stance and handling balance
• Specially designed shock bodies maintain maximum stroke even at a lowered ride height

Specifications

• Series: 5100, 1-Way
• Damper Type: Monotube, Inverted
• Rebound Adjustment: 12 Positions
• Front/Rear Ratio: 50% / 50%
• Includes Springs: Yes

Included Components

• 2x Front Coilover Struts
• 2x Rear Coilover Struts
• Springs

Product Description

The AST ACU-S6206S 5100 Series coilover kit brings race-proven, inverted monotube damper technology to the 2000-2007 GG/GD chassis Impreza WRX/STI, giving drivers 12 positions of rebound adjustment to dial in the ideal balance between everyday comfort and track-focused control. The large-piston monotube design eliminates the aeration and foaming common in twin-tube setups, delivering more consistent, responsive valving under hard driving.

This kit is a strong fit for GG/GD owners who want genuine performance suspension while retaining the flexibility to run OEM top mounts for a cleaner installation. Adjustable ride height and specially designed shock bodies maintain full stroke even when lowered, and since every AST damper is fully rebuildable at a certified service center, this kit is built to be a long-term investment rather than a disposable upgrade.