RS-R Best-i Active Coilovers
2021 Lexus IS350 F Sport RWD
Part #: XBIT591MA
Overview
The RS-R Best-i Active Coilovers are a high-performance suspension upgrade designed specifically for the 2021 Lexus IS350 F Sport RWD. These coilovers are engineered to enhance your vehicle's handling, stability, and aesthetic appeal, making them an ideal choice for enthusiasts who seek a lowered stance without sacrificing factory functionality.
Built to work seamlessly with the factory Dynamic Digital Suspension (DDS) system, the Best-i Active Coilovers allow you to retain the original digital damping controls. This means you can enjoy the benefits of adjustable ride height and improved handling while maintaining the factory digital damping features, providing a balanced blend of comfort and performance.
Key Features
- Compatible with the factory Digital Digital Suspension (DDS) system, ensuring full control over damping adjustments without losing factory digital features.
- Adjustable ride height with a front range of +15mm to -95mm (+0.6in to -3.8in) and a rear range of -10mm to -60mm (-0.4in to -2.4in), allowing for a customized stance.
- Spring rates of 8.00kg/mm (front) and 7.00kg/mm (rear) provide a firm yet comfortable ride, improving handling response and cornering stability.
- Designed with high-quality materials and construction techniques for durability and consistent performance under spirited driving conditions.
- Retains factory damping controls, enabling precise adjustments for different driving scenarios, from daily commuting to aggressive cornering.
- Lowered look enhances the vehicle's stance and visual appeal, giving your Lexus a more aggressive and sporty appearance.
- Easy bolt-on installation with no need for cutting or modifications, making it suitable for DIY enthusiasts and professional installers alike.
Construction & Design
The RS-R Best-i Active Coilovers feature a robust construction with high-strength steel bodies and precision-machined components. The coilovers are designed with a focus on durability, heat dissipation, and consistent damping performance. The adjustable components are engineered to provide a precise fit and reliable operation over time, ensuring your vehicle maintains optimal handling characteristics even after extensive use.
The coilovers incorporate a damping system that can be controlled via the factory digital interface, allowing you to fine-tune your ride quality and handling response. The design also emphasizes a lowered stance without compromising ride comfort or safety, thanks to the carefully calibrated spring rates and damping settings.
Installation & Fitment
The RS-R Best-i Active Coilovers are designed as a direct bolt-on upgrade for the 2021 Lexus IS350 F Sport RWD. Installation is straightforward for those familiar with suspension work, with no cutting, drilling, or complex modifications required. The coilovers utilize factory mounting points and hardware, ensuring a secure and precise fit. For optimal performance, professional installation is recommended, but experienced DIY enthusiasts can install these coilovers with basic tools and mechanical knowledge.
What's Included
- Complete set of front and rear coilovers with damping and height adjustment capabilities
- All necessary hardware and mounting components
- Installation instructions
Ideal For
- Enthusiasts seeking a lowered stance with factory digital damping control
- Drivers looking to improve handling, cornering, and overall vehicle responsiveness
- Owners who want a customizable ride height without sacrificing factory features
- Performance-oriented daily drivers and weekend spirited drivers
