The KYB Excel‑G front struts (part numbers 334430/334431) are twin-tube, nitrogen gas-charged dampers engineered as direct-fit replacements for Toyota Sienna models from 2004–2012. Manufactured on the same lines and calibrated to OEM specifications, they are purpose-built to restore the Sienna’s original ride control, handling stability, and braking responsiveness. Each strut features hand-assembled damping valves, seamless steel tubing to prevent flex, triple-chrome piston rods for reduced wear, multi-lip seals to prevent leaks, and precision valving that effectively manages wheel movement and body control — ensuring your van performs just as smoothly as it did when new.

Durability and reliability are key strengths of these struts. The nitrogen-charged design helps prevent fluid aeration, and the robust build quality—including thick strut bodies and corrosion-resistant coatings—means these components often exceed 150,000 miles in service life . Installation is takeaway-simple with bolt-on fit and included mounting hardware. After replacement, drivers commonly notice noticeably improved ride comfort, reduced front-end bounce, sharper steering feel, and restored highway stability—making the Excel‑G 334430/334431 a smart, long-lasting upgrade for an older Sienna.