• AST Suspension 5100 Series Coilovers (Includes Front/Rear Top Mounts) (True Coilover) - 2005-2007 Subaru WRX STI 2.5 (GG/GD PCD 5x114.3)
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AST 5100 Series Coilovers | Subaru WRX STI (GG/GD) (ACC-S6204S)

AST 5100 Series Coilovers | Subaru WRX STI (GG/GD) (ACC-S6204S)

ACC-S6204S

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$4,958.33 USD
$5,950.00 USD $4,958.33 USD
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The AST 5100 Series Coilovers for the Subaru WRX STI (GG/GD) from 2005 to 2007 are high-performance shock absorbers designed to enhance handling and suspension precision. Featuring inverted/upside-down technology, these coilovers are race-proven and deliver superior strength and durability compared to standard twin-tube designs. They improve suspension geometry under heavy lateral and braking loads, making them ideal for spirited street driving and track use. The adjustable rebound feature allows for fine-tuning of damping characteristics, providing a customizable ride quality that balances comfort and performance. Constructed with high-quality materials, these coilovers are engineered to withstand demanding conditions and deliver consistent performance.

Designed specifically for 2005-2007 Subaru WRX STI models with a 2.5-liter engine and a 5x114.3 bolt pattern, these coilovers are a direct replacement for stock suspension components. They are intended for enthusiasts seeking improved handling, cornering stability, and ride height adjustment. Installation is straightforward for those familiar with suspension upgrades, and the kit includes the necessary shock absorbers with adjustable features. Suitable for both street and track applications, these coilovers help optimize your vehicle’s suspension setup for aggressive driving, autocross, or daily performance driving. Compatibility with stock or aftermarket components is maintained, ensuring a seamless upgrade experience.

Overview

The 5100 Series shock absorbers for the 2005-2007 Subaru WRX STI 2.5 (GG/GD PCD 5x114.3) utilize inverted / upside down technology. The inverted design is race proven technology and produces an extremely strong damper, providing better suspension geometry under heavy lateral and braking loads as seen in a road and track environment.

The 5100 Series shock absorbers give your car a better performance than the standard twin tube design. With the 5100 Series suspension you can adjust rebound with one knob. The adjust platform allows you to adjust the ride height of your car. AST suspension shock bodies are specially designed to keep maximum stroke, even with a lower ride height.

How a Monotube design works?

Monotube design is essential for performance. The oil and nitrogen are separated by a floating piston, and allows the use of a larger piston, increasing the damper performance and sensitivity felt by the driver, all this added together produces more grip, gives more control and driver feedback from your vehicle.

What is a rebound adjustment?

Rebound controls the rate of extension of your shock absorber. By changing the rebound you can directly change the characteristics of the vehicle.

Features

  • Floating piston design with high pressure nitrogen means no cavitation around the piston.
  • 14mm diameter internal shaft.
  • 44.5 mm diameter shaft struts, inverted.
  • Steel cylinder body shocks, inverted.
  • High end, track ready suspension.
  • Rebound adjustable ('Singles').
  • Low friction seal.
  • Adjuster knobs permanently mounted on the dampers.
  • Designed to use OEM top mounts.
  • Rubber bushings for 'eye' shock mounts.
  • Includes springs.
  • Rebuildable.
  • Optional spherical top mounts.
  • Optional DLC (diamond like carbon) coated shafts.
  • Optional DDP (double digressive piston).
    • Double Digressive Pistons are recommended for use on the non-driven wheels.
    • 4WD/FWD vehicles: DD pistons for both rear axle struts/shocks.
    • RWD vehicles: DD pistons for both front axle struts/shocks.
  • Optional custom valving.
Specifications
  • Part Number: ACC-S6204S
  • Product: AST 5100 Series
  • Adjustment: 1 Way
  • System: Coil Over
  • Product Note: True Coilover
  • Front/Rear Ratio: Front = 50% / Rear = 50%
  • Strut/Shock Type: Front: Bracket McPherson strut / Rear: Bracket McPherson strut
  • Model Years: 2005-2007
  • Make: Subaru
  • Model: WRX STI
  • Chassis: GG/GD PCD 5x114.3
  • Spring Kit: Included
  • Top Mounts: Front / Rear Included
  • Front Top Mounts: TMA-S01-C1-20F - Camber adjustable (25mm raised into body)
  • Optional Front Top Mounts: TMA-S01-A1-20F - Camber adjustable
  • Rear Top Mounts: TMA-S01-A1-30R - Camber adjustable
  • Adjustable Front Droplinks Available? No
  • Adjustable Front Droplinks Required? No
  • Adjustable Rear Droplinks Available? No
  • Adjustable Rear Droplinks Required? No
  • DDP Pistons Included? No
  • DDP Pistons Available? Yes
  • DLC Coated Shafts Included? No
  • DLC Coated Shafts Available? Yes
  • QDC Included? No
  • TUV Approved?
  • Comments: Works with OE top mounts. For track spec top mounts need to be added.
Vehicle Fitment
  • 2005 Subaru WRX STI 2.5 (GG/GD PCD 5x114.3)
  • 2006 Subaru WRX STI 2.5 (GG/GD PCD 5x114.3)
  • 2007 Subaru WRX STI 2.5 (GG/GD PCD 5x114.3)
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