# KYB 551606 High Pressure MonoTube Gas Strut for 2005–2009 Cadillac STS

### Performance Overview

KYB High Pressure Monotube Gas Strut have additional performance advantages over the twin-tube design. The Gas-A-Just is available as an OE monotube replacement and as an OE twin-tube performance upgrade. The monotube design provides the best combination when you need or want more than average or designed ride control performance and steering responsiveness.

KYB is a worldwide leading supplier of shocks and struts to new vehicle manufacturers. World-Class engineering and quality have made KYB the original equipment shocks for Lexus, Toyota, Saturn, Infiniti, Chrysler, and Ford. Their products are made from the highest quality materials, and guarantee to deliver superior handling, comfort, and control.

### Key Features

-   Part Number: 551606
-   Product Type: Gas Strut
-   Monotube Design

### Vehicle Fitment Table

Year

Make

Model

Position

Fitment Precision

Note

2005

Cadillac

STS

BASE; Rear Wheel Drive

2006

Cadillac

STS

BASE, V; Rear Wheel Drive

2007

Cadillac

STS

BASE, V; Rear Wheel Drive

2008

Cadillac

STS

BASE, V; Rear Wheel Drive

2009

Cadillac

STS

BASE, V; Rear Wheel Drive

### FAQ

**Will this fit my vehicle?**  
Please verify your year, make, model, position, and any fitment notes using the compatibility table above before purchase.

**What part number is this?**  
The listed part number is 551606.

**Is this product designed for direct replacement?**  
Yes. This product is intended to match the compatible vehicle applications listed in the fitment table.

**Should I confirm fitment before ordering?**  
Yes. Always compare your original part, position, and vehicle details with the fitment table before ordering.

### Common Searches

-   Gas Strut for Cadillac STS
-   551606 fitment
-   KYB Gas Strut
-   2005–2009 Cadillac STS Gas Strut
-   KYB 551606 replacement

## Details

- **Price:** 387.15 CAD
- **Vendor:** KYB
- **Type:** Gas Strut
- **Tags:** 2005 Cadillac STS, 2006–2009 Cadillac STS, 551606, Gas Charged, Gas Strut, KYB, Monotube, OE Replacement, Suspension

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 387.15 CAD | In stock |

## Images

- KYB 551606 High Pressure MonoTube Gas Strut for 2005–2009 Cadillac STS

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> Source: [Standard Auto Part](www.standardautopart.com/products/kyb-cadillac-sts-strut-551606)
> Updated: 2026-06-19