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Ksport CSB120-GT GT Pro Inverted 55mm Monotube Coilover Kit with Pillowball Top Mounts 36-Way Damping

(2005-2007 Subaru Impreza WRX STI/WRX STI Limited)

Manufacturer

Part Number

CSB120-GT
Sale Price

$1,657.50

Estimated ship date Sunday, November 22

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No Hassle Returns

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Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Ksport GT Pro Damper System (CSB120-GT) is a premium fully adjustable coilover kit built on the same proven platform as Ksport's top-selling Kontrol Pro system — with significant upgrades in shock body size, thermal management, and structural performance for drivers who demand more from their suspension.

Inverted 55mm Monotube Shock Bodies

The GT Pro's defining feature is its large 55mm inverted shock body design — more than double the diameter of standard 20mm shock bodies. The inverted front configuration repositions the gas/oil chamber away from the knuckle and braking components, significantly reducing heat transfer and allowing the system to run cooler under sustained load. This layout also lowers unsprung weight, contributing to sharper handling response and improved road feel.

Monotube High-Pressure Damper Construction

All GT Pro units use a high-pressure Monotube design, keeping oil and nitrogen gas separated within the cylinder. Compared to conventional twin-tube designs, the Monotube configuration dissipates heat more efficiently, enables finer damping adjustments, and is far less susceptible to aeration and cavitation — resulting in more consistent damping performance across varying driving conditions.

Key Features:

  • 36-Way Adjustable Damping — simultaneously adjusts compression and rebound for quick, user-friendly tuning between comfort and performance
  • Inverted 55mm Shock Bodies — increased oil capacity, superior cooling, and reduced unsprung weight vs. standard designs
  • Metal Pillowball Top Mounts — front and rear pillowball mounts provide direct steering feel and solid driver feedback; camber adjustment available on select applications
  • Adjustable Spring Perch & Lower Mount — dial in ride height without sacrificing suspension travel
  • 6061-T6 Billet Aluminum Hardware — mounts, collars, and spring perches are machined from aerospace-grade aluminum for a lightweight, durable, and corrosion-resistant build
  • Zinc-Electroplated Steel Shock Body — protects against rust and environmental exposure
  • Matched Valving & Spring Rates — each kit is valved specifically to its installed spring rates for optimized ride quality and long-term reliability

The Ksport GT Pro Coilover System is engineered for enthusiasts and track-day drivers who require a step beyond the street-oriented Kontrol Pro — delivering measurable gains in thermal durability, damping precision, and suspension response without sacrificing adjustability or everyday usability.

Products specifications

Fits

2005-2007 Subaru Impreza WRX STI/WRX STI Limited

Spring Rate (F)

8.7/487kg/lbs

Spring Rate (R)

5.1/286kg/lbs

Upper Mount (F)

P/U

Upper Mount (R)

P/U

Top Mount Type - Front

Pillowball Mount with camber adjustment

Lower Mount Type

Adjustable

Gas Charged

Yes

Ksport Product Category

Coilover Kits

Spring Rate Front kg/mm

8.7

Subject to CARB? Yes/No

No

Dust Shield

No

Spring Rate Rear kg/mm

5.1

Upper Mount Type

Pillowball Mount with camber adjustment

Top Mount Type - Rear

Pillowball Mount with camber adjustment

Adjustable Height

yes

Ksport Product Sub-Category

GT Pro Coilover Kit

Would Buy From Company Again

The best price I could find and it arrived in 2 days! I'll be back for more.

I have found the BEST price on a part clearly overpriced at other online stores... Excellent customer service knowledgble of mustang performance! Will surely buy again!

Cheap prices, great quality, and fast delivery. Autoplicity will continue to receive my patronage.

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