RS-R T591D Down Lowering Springs for 21-25 Lexus IS300 & IS350 RWD GSE31

Vehicle Fitment

• 2021-2025 Lexus IS300 RWD (GSE31, 2.0L Turbo inline-4 and 3.5L V6, RWD)
• 2021-2025 Lexus IS350 RWD (GSE31, 3.5L V6, RWD)

Fitment Notes

• Set includes all four springs (front and rear); front and rear drop ~1.0-1.2" (~25-30 mm).
• Designed to work with OEM shocks; coilover systems or aftermarket dampers may require re-valving.
• RWD chassis only; not compatible with AWD models.
• Fitment confirmed through 2025.

Features

• Japanese-engineered Down Sus springs deliver balanced ride and improved handling.
• Maintains near-OEM suspension travel while lowering stance for better center of gravity.
• Constructed from high-quality JDM-grade spring steel for durability and ride comfort.
• Optimized spring rates for both daily comfort and spirited driving performance.
• Plug-and-play design--no modifications; drop-in fit.
• Comes as a complete set for proper corner balancing.
• Cost-effective alternative to coilovers with ride quality preserved.
• Covered under RS-R USA's limited 3-year or 36,000-mile warranty.

Specifications

• Drop amount: Front ~1.0-1.2" (25-30 mm), Rear ~1.0-1.2" (25-30 mm)
• Spring rates: Front 5.48 kg/mm, Rear 8.16-8.18 kg/mm
• Material: High-quality JDM spring steel
• Configuration: Complete 4-spring set
• Warranty: 3 years or 36,000 miles (original purchaser, manufacturing defects)
• Installation: Uses stock shock mounts; no additional parts required
• Prop 65: CA warning applies

Included Components

• 2x Front lowering springs
• 2x Rear lowering springs

Product Description

The RS-R T591D Down Sus lowering spring kit delivers a refined 1.0-1.2-inch drop for both front and rear of the RWD Lexus IS300 and IS350 (GSE31, 2021-2025 models). Designed in Japan with precision JDM spring steel, the kit enhances handling and lowers the center of gravity while preserving ride comfort and suspension travel.

The plug-and-play springs are intended for use with the factory dampers--no part swaps or modifications needed. Featuring vehicle-specific spring rates (5.48 kg/mm front, 8.16-8.18 kg/mm rear) and backed by RS-R USA's 3-year or 36,000-mile warranty, this kit offers both performance and practical everyday use at a price point well below full coilover systems.