RS*R XBIT310M Sports-i Coilover Kit for Lexus IS300

The RS*R XBIT310M Sports-i Coilover Kit is a premium monotube coilover system engineered specifically for the 1998–2004 Lexus IS300 (JCE10 chassis). Hand-assembled in Japan, this kit delivers the ideal balance between daily-driving comfort and serious track-day performance—without compromise.

Key Features:

• 36-Way Adjustable Damping: Front and rear damper dials offer 36 levels of compression and rebound tuning, allowing precise setup for virtually any driving condition
• Monotube Shock Construction: Single-tube monotube design provides superior heat dissipation and consistent damping response compared to twin-tube alternatives
• Full Ride Height Adjustment: Lower-mount perch system allows independent ride height adjustment; preset drop is approximately -35mm (front) and -40mm (rear), with a maximum range of 0 to -100mm front and rear
• Vehicle-Specific Spring Rates: Front spring rate of 10.00 kg/mm and rear spring rate of 8.30 kg/mm are matched to the IS300 chassis for optimized handling dynamics
• Laser-Cut Upper Mounts & Hand-Welded Lower Brackets: Premium fabrication methods ensure structural integrity and fitment precision
• Silent Roller Bearings: On MacPherson-type front suspension, roller bearings eliminate spring twist noise during steering input
• Rubber Padding: Strategically placed rubber padding minimizes noise from suspension movement during daily driving
• Rebuildable Design: Damper cartridges can be overhauled, extending the service life of the kit
• Warranty: Backed by RS*R's 1-year / 12,000-mile warranty from date of purchase

The RS*R Sports-i line is developed with motorsport DNA—drawing on RS*R's experience in Super GT and Formula Drift racing—to produce a coilover kit that is equally at home on a spirited canyon run or a weekend track event.