KYB SR4049 Strut-Plus Complete Corner Unit Assembly with Strut, Mount and Spring

The KYB SR4049 Strut-Plus is a fully pre-assembled complete corner unit that includes everything needed to restore your vehicle's original ride height, handling, and stability. As a global original equipment supplier, KYB engineers this assembly to match OE performance specifications — no guessing, no compromises.

At the heart of the SR4049 is a KYB Excel-G twin-tube, gas-charged strut built with a stronger steel outer shell and application-specific precision damping valves assembled by hand. The assembly also includes a high-carbon steel coil spring developed to account for vehicle-specific corner weights, ensuring ride height is restored within OE tolerances.

What's Included:

• KYB Excel-G gas-charged twin-tube strut
• High-carbon steel coil spring with corrosion-resistant coating
• Upper strut mount and bearing plate
• Upper and lower spring isolators/insulators
• Polyurethane boot and jounce bumper (travel-limiting bumper)

Key Features:

• No spring compressor required — arrives fully pre-assembled for faster, safer installation
• Corner-specific design — KYB manufactures unique part numbers for varying engine sizes, ride heights, vehicle weights, and left/right applications
• OE-restoring performance — damping valves hand-assembled in-house to restore the handling and stability the vehicle manufacturer intended
• Electronic safety system compatible — proper damping supports Electronic Stability Control, automated braking, and crash avoidance systems
• Fatigue-tested coil spring — corrosion-resistant coating for long-term durability
• Sold individually

The KYB Strut-Plus SR4049 is backed by a lifetime warranty on the strut damper component (for original retail purchaser, vehicle-specific) and a one-year warranty on coil springs, mounts, and hardware components.