The KYB Excel‑G front struts (part numbers 334399 & 334400) are nitrogen gas–charged, twin‑tube dampers engineered as direct-fit, OEM-grade replacements for Toyota Highlander (2001–2007) and Lexus RX330/350/400h (2004–2009). Assembled on the same production lines as original equipment, they feature vehicle-specific valving designed to restore grip, steering precision, and ride comfort—especially in worn suspension scenarios. With hand-assembled damping valves, triple‑chrome piston rods, sintered‑iron rod guides, multi‑lip oil seals, and seamless steel cylinders, they offer durable and responsive performance—rated to last beyond 150,000 miles.

Constructed to hold up under stress, these struts include hefty steel bodies and mounting brackets to reduce flex and preserve alignment over time—boosting both handling consistency and safety. The robust sealing and nitrogen charge prevent foaming, ensuring reliable damping even in extreme conditions. Typically bought as a pair, the 334399 (right) and 334400 (left) struts come with factory hardware, making installation bolt-in and hassle-free. Owners consistently report that these units bring back the vehicle’s original handling precision and ride smoothness—making them a top-choice cost-effective alternative to factory parts.