RS-R T171S Super Down Lowering Springs for 13-20 Lexus GS350 RWD Base/F-Sport

Vehicle Fitment

• 2013-2015 Lexus GS350 RWD (GRL10 chassis)
• 2016-2020 Lexus GS350 RWD (GRL12 chassis)

Fitment Notes

• Complete lowering spring kit -- includes front and rear springs only; shocks/struts not included.
• Designed for RWD GS350 only -- not compatible with AWD models or other GS/V series without verification.
• Installation recommended with full alignment and inspection of front/rear suspension components for wear.
• Regular driving and occasional spirited use supported; after-market performance shocks may enhance ride quality.

Features

• High-tensile spring steel engineered for lowered stance and improved handling
• Progressively wound coils maintain ride quality while reducing body roll
• Optimised drop for RWD GS350 platform -- preserving geometry and handling balance
• Factory spring seat compatibility -- no modifications to seats or mounts required
• RS-R branding and colour-coded finish for authenticity and quality assurance
• Improved cornering stability and more aggressive visual stance post installation
• Backed by RS-R's quality standards -- designed to meet Japanese performance manufacturing
• Supplied as a 4-spring set (front + rear) -- everything you need for a complete drop

Specifications

• Part Number: T171S
• Series: Super Down Lowering Springs
• Material: High-tensile spring steel (pre-set and shot-peened)
• Front Drop (2013-15): ~-45 mm to -50 mm (-1.8" to -2.0")
• Rear Drop (2013-15): ~-45 mm to -50 mm (-1.8" to -2.0")
• Front Drop (2016+): ~-35 mm to -40 mm (-1.4" to -1.6")
• Rear Drop (2016+): ~-40 mm to -45 mm (-1.6" to -1.8")
• Spring Rates: Front ~4.89 kg/mm; Rear ~8.16 kg/mm (approximate)
• Warranty: Limited manufacture warranty for street use (check local distributor terms)

Included Components

• 2x Front coil springs
• 2x Rear coil springs
• Instruction manual & installation guidelines
• RS-R decal and warranty registration info

Product Description

The RS-R Super Down Springs T171S kit is designed specifically for the rear-wheel-drive Lexus GS350 (2013-2015 GRL10 and 2016+ GRL12 chassis). With engineered drop ranges and handling enhancements, this kit reduces your ride height by approximately 1.4" to 2.0" depending on model year and trim, delivering a sharper stance and improved cornering feel while respecting the vehicle's suspension geometry.

Crafted from high-tensile spring steel, the Super Down springs offer a performance-oriented upgrade that balances ride comfort and dynamic response. Installation retains the factory spring seats and does not require replacement of the shocks or struts (though pairing with upgraded dampers may optimise performance). Ideal for drivers who want both improved aesthetics and driving feel, the T171S kit is a well-engineered solution from RS-R for the GS350 platform.