KYB SR4056 Strut Corner Unit 781552633242

( Brand: Kyb ), ( Manufacturer Part Number: SR4056 ), ( UPC: 781552633242 ), ( Gtin: 00781552633242 )

Review KYB Strut Plus Complete Corner Unit Assembly Black

The **KYB SR4056 Strut Corner Unit** is a high-performance suspension component meticulously engineered to deliver superior handling, durability, and ride comfort for performance-oriented vehicles. Part of KYB s renowned **Sport Reflex** line, this strut corner unit is specifically designed to enhance steering precision, reduce body roll, and absorb road imperfections with exceptional efficiency. Constructed from premium materials, including a robust coil spring, a high-performance shock absorber with KYB s proprietary **Gas Reflex** damping technology, and a durable strut tower assembly, the SR4056 ensures a balanced blend of stiffness and compliance. The **Gas Reflex** system utilizes nitrogen gas under pressure to eliminate air bubbles within the damping fluid, preventing foaming and maintaining consistent performance even under extreme conditions, such as aggressive cornering or repeated high-speed impacts. This strut corner unit features a **twin-tube design**, which provides superior heat dissipation, ensuring long-lasting durability and reliable performance over thousands of miles. The coil spring is precision-wound to offer optimal spring rates, allowing for a firmer yet controlled suspension feel, while the shock absorber s **adjustable valving** fine-tunes damping characteristics to suit both track use and daily driving demands. Whether installed on high-performance sedans, sports cars, or performance-tuned SUVs, the KYB SR4056 delivers a noticeable improvement in cornering stability, reduced suspension dive or squat, and a more engaged, responsive ride. Built to meet or exceed OEM specifications while incorporating advanced engineering, this strut corner unit is an ideal choice for enthusiasts seeking a noticeable upgrade in handling dynamics without sacrificing comfort or reliability.

### **Pros and Cons of Buying a KYB SR4056 Strut Corner Unit**

1. **Improved Ride Comfort** A fresh strut corner unit can reduce road noise, vibrations, and harshness, providing a smoother ride compared to worn-out or damaged components.

2. **Enhanced Handling** New struts help maintain proper suspension geometry, improving steering response, cornering stability, and overall vehicle control.

3. **Better Braking Performance** Worn struts can cause brake drag or uneven tire wear, leading to reduced braking efficiency. Replacing them ensures optimal brake function.

4. **Prevents Further Damage** A failing strut can damage other suspension components (e.g., bushings, control arms, or subframe). Replacing it early prevents costly repairs.

5. **Extended Tire Life** Properly functioning struts ensure even tire wear, reducing the need for premature tire replacements.

6. **Reliability & Safety** Struts play a critical role in vehicle stability, especially during sudden maneuvers or emergency stops. A faulty strut increases crash risk.

7. **OEM or High-Quality Replacement** KYB is a reputable brand known for durability and performance, offering a reliable alternative to generic aftermarket parts.

8. **Easier Installation** Strut corner units are designed for straightforward replacement, often requiring only basic tools and minimal labor.

1. **Cost** Strut corner units are more expensive than individual shocks or springs, making them a significant upfront investment (typically $150 $300 per unit, depending on the vehicle and model).

2. **Labor Intensity** While not overly complex, replacing struts requires lifting the vehicle, removing wheels, and adjusting suspension components, which may necessitate professional help if DIY skills are limited.

3. **Potential for Other Wear** If other suspension parts (e.g., bushings, ball joints, or sway bar links) are worn, they may need replacement simultaneously, increasing costs.

4. **Mild Wear May Not Justify Replacement** If the struts are only slightly worn (e.g., minor leaks or slight sagging), they might last another 50,000 100,000 miles. Replacing them prematurely is unnecessary.

5. **Noise or Clunking After Installation** In some cases, new struts may produce temporary noises (e.g., from compressed air in the shocks) or require bedding-in to eliminate clunking.

6. **Compatibility Issues** Ensuring the correct part number (SR4056) matches the vehicle s make, model, and year is crucial. Mismatched parts can lead to poor performance or damage.

---

### **Conclusion**

Replacing a strut corner unit like the KYB SR4056 is a **highly recommended maintenance task** when signs of wear (e.g., leaking fluid, bottoming out, uneven tire wear, or clunking noises) are present. The benefits in safety, handling, and ride quality far outweigh the drawbacks, especially for vehicles with significant mileage or those used for daily driving. However, if the struts are still functional and the vehicle shows no concerning symptoms, replacement may not be urgent.

For most drivers, the **cost and effort are justified** to prevent safety risks and maintain optimal suspension performance. If budget is a concern, prioritize replacing both struts on the same axle (or all four if needed) to ensure balanced handling.

---

### **Recommendation**

- Visible leaks or damage to the strut.

- Excessive bouncing or sagging when driving over bumps.

- Uneven tire wear or reduced braking performance.

- Clunking or rattling noises from the suspension.

- The struts appear structurally sound with only minor wear (e.g., slight oil leaks without internal damage).

- The vehicle has low mileage and no history of suspension abuse.

- **Consider professional installation** if you lack experience with suspension work, as improper installation can lead to alignment issues or premature wear.

- **Pair with related maintenance** Inspect and replace any worn bushings, ball joints, or control arms during the same service to maximize longevity and safety.

**Final Verdict:** For most drivers, upgrading to a KYB SR4056 strut corner unit is a **worthwhile investment** that enhances safety, comfort, and vehicle performance. If symptoms of failure are present, do not delay replacement.

Details:

Material Type: Metal. Includes a fatigue-tested, and improved coil spring with corrosion resistant coating. Style: Modern. Brand Name: KYB.

Style Name: Modern. Auto Part Position: Right. Exterior Finish: Machined. KYB SR4056 Strut Plus Complete Corner Unit Assembly, Black: Brand.

Lifetime: All KYB Shocks Absorbs, Struts, and Strut Cartridges Except Strut-Plus TM, Air, Electric or Self Leveling Note: lifetime means for as long the original retail purchaser owns vehicle on which products were originally installed. KYB does not cut corners outtake a one-size fits-all approach when designing and manufacturing the Strut-Plus. Warranty Period. Item Type Name: Shock Spring Kits.

Compatible with Vehicle Type: Car, Truck. Automotive Fit Type: Vehicle Specific. Vehicle Service Type: Car, Truck. The KYB Strut-Plus is the best replacement strut assembly solution for vehicle specific, original equipment control and handling.

Model Number: SR4056. Manufacturer Part Number: SR4056. Included Components: Shock Spring Kits. OEM Equivalent Part Number: SR4056.

Manufacturer: KYB.

part #: sr4056 prices

• $212.51-$227.95

specifications reptsuppl:

• brand: Kyb
• mpn: Sr4056
• upc: 781552633242
• gtin: 00781552633242

shipping reptsuppl:

• type: Fixed
• class: Expedited
• cost: $0.00
• service: Expedited
• transit: 4-9 Days

returns reptsuppl:

• method: Money back
• policy: Returns Accepted
• time: 30 Days
• paid by: Buyer

offer reptsuppl:

• sold: 0
• options: Ship-to-home
• started: April 25, 2026
• quantity: 2
• availability: In Stock

seller reptsuppl:

• # reviews: 1179
• city: san bernardino,CA
• rating: 99.3%

payments reptsuppl:

• credit card: Diners-club
• other
• wallet: Google-pay

general reptsuppl:

• condition: New
• Pet Supplies > Reptile Supplies

Kyb SR4056 Is Similar To:

• Kyb Sr4174 Strut Plus Complete Corner Unit Assembly Black (94.7% similar) Automotive fit type: vehicle specific. Upc: is discontinued by manufacturer: no. Style: modern. Includes a fatigue tested, and improved coil spring with corrosion resistant coating. Global trade identification number: 86. Kyb SR4174 strut plus complete corner unit assembly, black: brand. Vehicle ...(January 26th, 2026)
• Kyb Sr4169 Strut Plus Complete Corner Unit Assembly Black (96.5% similar) Kyb SR4169 strut plus complete corner unit assembly, black: brand. Exterior finish: machined. Designed for proper ride height and original handling capabilities. Global trade identification number: 26. Oem part number: SR4169. Upc: manufacturer: Kyb. Automotive fit type: vehicle specific. The Kyb ...(February 9th, 2026)