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Drop the Ride Height on Your NX350 or NX350h Without Losing the Comfort Lexus Engineered In
RSRT539D gives NX350 AWD and NX350h FWD owners a factory-plus lowered stance using RS-R's precision-matched spring rates. Instead of a generic lowering spring stamped out for a dozen unrelated platforms, this set is calculated specifically around the NX's weight and factory shock valving, so the drop looks intentional and the ride stays composed.
Key Features
- Spring rates calculated specifically for the NX350 AWD and NX350h FWD platforms
- Front and rear drop for a balanced, level stance front to back
- Works with factory shocks and struts, no separate damper purchase needed
- Cold-wound Japanese spring steel resists sag over years of daily driving
- Powder coated finish for long-term corrosion resistance
- Complete four-spring set covers both front and rear corners
Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2022-2026 | Lexus | NX350 | AWD |
| 2022-2026 | Lexus | NX350h | FWD |
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | RSRT539D |
| Brand | RS-R |
| NX350 AWD Front Drop | 1.6 to 1.8 inch |
| NX350 AWD Rear Drop | 1.0 to 1.2 inch |
| NX350h FWD Front Drop | 1.0 to 1.2 inch |
| NX350h FWD Rear Drop | 1.2 to 1.4 inch |
| Front Spring Rate | 3.59 kg/mm |
| Rear Spring Rate | 4.53 kg/mm |
| Material | Cold-wound spring steel, powder coated |
| Set Contents | 4 springs (2 front, 2 rear) |
| UPC | 4511969420953 |
What's Included
- 2 front lowering springs
- 2 rear lowering springs
- Installation instructions
About RS-R
RS-R has engineered suspension springs in Japan since 1981, building a reputation on precise spring rate matching for factory dampers rather than one-size-fits-all aftermarket kits. The Down Sus line is developed specifically for daily-driven vehicles that want a lower stance and reduced body roll while retaining a comfortable, livable ride.
FAQ
What is the RSRT539D?The RSRT539D is a RS-R Down Sus lowering spring set built for the 2022 to 2026 Lexus NX350 AWD and NX350h FWD, dropping the vehicle roughly 1.0 to 1.8 inches depending on drivetrain and axle while retaining the factory shock absorbers.
Does this fit both the NX350 and NX350h?Yes, RSRT539D is matched for the NX350 AWD and the NX350h FWD drivetrain configurations. Confirm your specific drivetrain before ordering, since drop amounts differ slightly between the two.
Will this spring set work with my factory shocks?Yes. RS-R Down Sus springs are engineered to pair with factory shock absorbers, so no additional dampers are required.
How much drop should I expect?NX350 AWD sees roughly 1.6 to 1.8 inches front and 1.0 to 1.2 inches rear. NX350h FWD sees roughly 1.0 to 1.2 inches front and 1.2 to 1.4 inches rear.
Do I need an alignment after installing these springs?Yes. Any ride height change affects camber and toe, so a full four-wheel alignment is strongly recommended after installation.
Can I install this spring set myself?Installation requires a spring compressor and standard suspension tools. Experienced DIY mechanics can typically complete the job, though professional installation is recommended if you are unfamiliar with compressed coil springs.
Does this kit include new shocks or struts?No. RSRT539D replaces only the coil springs and is designed to work with your existing factory strut and shock assemblies.
Will lowering my NX affect the factory warranty?Suspension modifications can affect warranty coverage on suspension-related components. Check with your Lexus dealer regarding your specific warranty terms before installation.
Install Instructions
- Raise and safely support the vehicle, then remove the wheels.
- Support the lower control arm and disconnect the strut assembly from the vehicle.
- Use a spring compressor to safely relieve spring tension and remove the factory spring.
- Install the RS-R lowering spring in the same orientation as the factory spring.
- Reassemble the strut assembly and torque all hardware to factory specifications.
- Reinstall the wheels and repeat on all four corners.
- Lower the vehicle and schedule a full four-wheel alignment.
Lowering Springs
Shop lowering springs at Black Ops Auto Works for improved stance, reduced wheel gap, sharper handling, better road feel, and a more aggressive performance look. This collection includes sport springs, performance lowering springs, SUV lowering springs, Pro-Kit springs, Spec-R springs, Super Sport springs, OE sport springs, lowering coil kits, front lowering springs, rear lowering springs, and vehicle-specific suspension upgrades for cars, trucks, SUVs, EVs, muscle cars, and performance platforms. Use this Lowering Springs collection to find the right spring setup by vehicle platform, drop amount, brand, suspension type, and driving goal. Lowering springs are a popular suspension upgrade for drivers who want a lower stance, improved cornering stability, reduced body roll, better wheel fitment, and a cleaner appearance without moving to a full coilover system. Shop Lowering Springs by Category Black Ops Auto Works carries lowering springs and performance spring upgrades across key ca...
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RS-R
Welcome to the RS-R Collection, where performance meets quality. RS*R is globally recognized for its exceptional suspension and exhaust products, making it a top choice for automotive enthusiasts. About RS*R With a heritage rooted in innovation, RS*R has consistently delivered products that enhance your vehicles Suspensions performance. Their offerings include: ExMag Exhaust System: A classic design that provides superior performance and sound. Ti2000 Suspension Kits: Cutting-edge technology for improved handling and ride quality. Aftermarket Suspension Kits: Tailored solutions for various vehicle makes and models. Why Choose RS-R? High-quality materials and craftsmanship Innovative designs that push the limits of performance Commitment to customer satisfaction and continuous improvement Explore our curated selection of RS-R products and experience the difference in performance and quality that only RS*R can deliver. Get your RS-R suspension today only at Blackops Auto Works.
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Suspension
Aftermarket suspension systems improve handling, ride quality, and ride height adjustment beyond what the factory suspension provides. From lowering springs and coilover kits for sport handling to lift kits and leveling kits for truck and SUV off-road capability, quality suspension components transform how a vehicle rides and handles. Popular Suspension Upgrades Popular suspension upgrades include coilover kits for adjustable ride height and damping, sport lowering springs for improved handling and reduced body roll, performance shock absorbers and strut assemblies, sway bar and end link upgrade kits, subframe brace kits, and complete suspension packages for lifted trucks and off-road SUVs. Alignment kits including camber bolts and camber arms are also frequently ordered after ride height changes. What is the difference between coilovers and lowering springs? Coilovers are complete shock and spring assemblies with adjustable ride height set by threading the spring perch on the shock...
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