RS-R T999D Down Sus Lowering Springs for 15-25 Lexus RC F/16-20 GS F USC10/URL10

Vehicle Fitment

• 2015-2025 Lexus RC F (Base/Track Edition; 5.0L V8 naturally aspirated, RWD, USC10)
• 2016-2020 Lexus GS F (Base; 5.0L V8 naturally aspirated, RWD, URL10)

Fitment Notes

• Spring set only (front and rear). Designed to work with factory dampers and geometry.
• Does not fit RC 200t/300/350 or GS (non-F) models.
• RC F fitment confirmed through 2025. GS F fitment confirmed through 2020.

Features

• Precisely engineered "Down Sus" lowering springs tailored to USC10/URL10 chassis.
• Subtle, performance-focused drop that reduces fender gap and lowers center of gravity.
• Maintains daily-drivable ride quality while sharpening handling response.
• Vehicle-specific rates for balanced front/rear roll control.
• High-quality Japanese manufacturing and durable protective coating.
• Direct bolt-in installation; no cutting or trimming required.
• Compatible with OEM top mounts and factory-length dampers.
• Includes all four springs (front pair + rear pair).

Specifications

• Part Number: T999D
• Spring Rates: Front 8.67 kg/mm; Rear 14.40 kg/mm
• RC F (2015-2019, Base): Front drop ≈ 1.2-1.4 in (30-35 mm); Rear drop ≈ 0.8-1.0 in (20-25 mm)
• RC F (2020-2025, Base/Track Edition): Front drop ≈ 1.0-1.2 in (25-30 mm); Rear drop ≈ 0.6-0.8 in (15-20 mm)
• GS F (2016-2020, Base): Front drop ≈ 1.0-1.2 in (25-30 mm); Rear drop ≈ 0.8-1.0 in (20-25 mm)
• Drivetrain: RWD only
• Chassis Codes: RC F = USC10; GS F = URL10

Included Components

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

Product Description

RS-R's T999D "Down Sus" springs deliver a refined stance and sharper handling for Lexus's V8 F-models. Engineered specifically for the USC10 RC F and URL10 GS F platforms, the springs lower the car enough to reduce fender gap and roll without compromising the factory balance that makes these cars so engaging.

Each set is precisely wound to vehicle-specific rates and finished for durability, installing directly with OEM mounts and dampers. With trim- and year-specific drop figures detailed above, T999D is the clean, reliable way to achieve a purposeful look and predictable, confidence-inspiring response on street or spirited drives.