KYB Suspension Suspension Strut and Coil Spring Assembly

KYB Strut-Plus: The Complete Strut and Coil Spring Assembly Solution

When a strut wears out, the coil spring and mounting hardware often aren't far behind. KYB Suspension engineered the Strut-Plus line specifically to address this reality — delivering a fully pre-assembled suspension strut and coil spring unit that restores a vehicle's original ride height, handling, and stability in a single service visit. With over 470 assemblies available across this Suspension Strut and Coil Spring Assembly category, KYB covers an enormous range of domestic and import applications.

Built Around the Excel-G: OEA-Classified Engineering

At the core of every KYB Strut-Plus assembly is the renowned Excel-G strut — a nitrogen gas-charged, twin-tube design that KYB classifies as OEA (Original Equipment for the Aftermarket). The Excel-G is manufactured on the same assembly lines and with the same components used for KYB's original equipment production. Each strut features hand-assembled rebound and compression valves built in a pressurized clean room, seamless extruded steel inner cylinders, a Teflon-banded piston for a positive seal, and a triple-chrome-plated piston rod to minimize seal wear and extend service life.

The coil springs in each assembly are equally application-specific. High-carbon steel springs are developed around individual vehicle attributes and corner weights to restore ride height within OE specifications — not just approximately, but precisely. Each assembly also uses distinct left- and right-side part numbers with side-specific components, exactly as the vehicle manufacturer originally intended.

Everything Included — No Spring Compressor Required

One of the most practical advantages of KYB's complete assemblies is that they arrive pre-loaded with every component needed for the job: the Excel-G strut, coil spring, top mount, insulator, bearing plate, boot, bumper stop, and attaching hardware. This eliminates the need for a spring compressor, reduces labor time, and ensures that all components are matched and calibrated to work together from the start. Replacing the strut mount at the same time as the strut and spring is especially important, since worn bearing plates and insulating materials directly affect noise, vibration, and steering response.

The Truck-Plus: Strut Assemblies Built for Demanding Duty

For truck and SUV owners who tow, haul, or go off-road, KYB offers the Truck-Plus performance strut assembly. This line is built around KYB's Gas-a-Just monotube strut and delivers up to 25% more damping performance than standard replacement shocks, making it a genuine upgrade for vehicles that go beyond everyday commuting demands.

Compatibility with Modern Electronic Safety Systems

Modern vehicles rely on Electronic Stability Control, ABS, and automated braking systems that depend on precise suspension behavior. KYB's Strut-Plus assemblies are engineered to support these electronic safety systems, ensuring the suspension performs exactly as the vehicle manufacturer designed — a critical consideration that budget or generic alternatives may not address.

Warranty Confidence

KYB backs its Strut-Plus assemblies with a lifetime limited warranty on the damper (strut) component for the original retail purchaser, and a one-year warranty covering coil springs, strut mounts, boots, and hardware. It's a coverage structure that reflects KYB's confidence in the quality of their engineering and manufacturing.