The Nissan R35 GT-R is a engineering marvel that has earned its reputation as a supercar killer, but even the Godzilla can benefit from thoughtful modifications. While the stock car offers exceptional grip and acceleration, its handling limits and aerodynamic balance can be further refined to match a driver's specific goals—whether that's dominating track days, carving canyon roads, or simply enjoying a more responsive daily driver. In this expanded guide, we will explore the three core chassis upgrades that deliver the most noticeable improvements: sway bars, coilovers, and aerodynamic components. Each modification addresses a distinct aspect of the vehicle's dynamics, and when integrated correctly, they transform the R35 into an even more capable and connected machine.

Why Focus on Chassis and Aero Upgrades?

The R35 GT-R's all-wheel-drive system and dual-clutch transmission are already formidable, but the suspension and aerodynamics are the critical interfaces between the driver and the road. Stock sway bars are tuned for comfort and understeer reduction, coilovers compromise between ride quality and track precision, and the factory aero package prioritizes low drag over maximum downforce. By upgrading these areas, you directly address the vehicle's roll stiffness, damping control, and high-speed stability—factors that determine cornering grip, steering feedback, and confidence at speed. Moreover, these modifications are relatively accessible compared to engine tuning, making them popular first steps for enthusiasts who want to extract more from their GT-R without compromising reliability.

Sway Bars: Fine-Tuning Roll Resistance

Sway bars, also known as anti-roll bars, are torsion springs that connect the left and right suspension on each axle. Their primary job is to resist lateral body lean during cornering. The R35 GT-R comes with moderate sway bars from the factory, but increasing their stiffness can dramatically reduce body roll and improve turn-in response.

How Sway Bars Work on the R35

When you enter a corner, weight transfers to the outside wheels. The sway bar twists, applying a counteracting force that lifts the inside wheel and flattens the car. A stiffer bar increases this resistance, keeping the chassis more level. On the R35, upgrading front and rear sway bars allows you to adjust the car's balance: a stiffer front bar promotes understeer (less rotation), while a stiffer rear bar promotes oversteer (more rotation). Many drivers prefer a slightly stiffer rear bar to reduce the GT-R's inherent understeer and improve corner exit traction.

Choosing the Right Stiffness

Aftermarket sway bars for the R35 are available in various thicknesses and materials, with hollow or solid construction. Brands like HPA Motorsports and AMS Performance offer adjustable bars that let you choose multiple stiffness settings. A common recommendation is to increase rear bar stiffness by 30-50% over stock while keeping the front bar close to factory spec. This improves rotation without sacrificing stability. However, if you have coilovers with high spring rates, you may need less sway bar stiffness to avoid a harsh ride. Always consult with a suspension specialist to match sway bars to your spring rates and driving style.

Installation and Alignment Considerations

Installing sway bars on the R35 is a straightforward job for a qualified mechanic, but it's important to use urethane or spherical bushings to reduce play. Additionally, after installing sway bars, a proper alignment is essential—especially if you also adjust ride height. The goal is to maintain even tire contact patch through the corner. Many shops recommend a performance alignment with -1.5 to -2.0 degrees of negative camber up front and -1.0 to -1.5 in the rear. This will maximize cornering grip while still allowing reasonable tire wear for street use.

Coilovers: The Foundation of Handling

Coilovers replace the factory dampers and springs with a single unit that offers adjustable ride height, compression, and rebound damping. This is the single most transformative upgrade for the R35's handling because it directly controls how the car responds to bumps, braking, and acceleration forces.

Types of Coilovers: Street, Track, and Motorsport

Coilovers range from simple height-adjustable units to sophisticated double-adjustable systems with remote reservoirs. For street-driven R35s, a quality set from Ohlins or KW Suspensions (such as the KW Variant 3 or Ohlins Road & Track) offers a good balance of comfort and performance. These feature independent adjustment of bump and rebound, allowing you to dial in responsiveness without excessive harshness. For dedicated track cars, a race-oriented coilover from JRZ or MCS provides more adjustment range and higher oil capacity but may compromise street comfort. Budget options exist, but investing in reputable brands ensures valving that matches the R35's weight and geometry.

Spring Rates and Damping Adjustments

Selecting the correct spring rate is critical. The stock GT-R has spring rates around 10 kg/mm front and 8 kg/mm rear. Many aftermarket coilovers offer rates from 12 to 18 kg/mm. Higher rates reduce body motion but increase road harshness. A good starting point for a dual-purpose street/track car is 14 kg/mm front and 12 kg/mm rear. Damping adjustments then fine-tune the response: increase rebound to control the spring's return, and adjust compression to manage how the car absorbs bumps. A common mistake is setting damping too stiff, which leads to a skittish ride and reduced traction. Start with the manufacturer's recommended settings and adjust in small increments based on track or road feedback.

Ride Height and Corner Balancing

Lowering the R35 improves center of gravity and reduces aerodynamic drag, but excessive drop can negatively affect suspension geometry—causing bump steer and reduced travel. A drop of 0.5 to 1.0 inches is typical. More important than absolute height is corner balancing: adjusting ride height at each corner to make the car's weight distribution equal across diagonals. This ensures consistent handling in left and right turns. After installing coilovers, always have the car corner balanced by a professional alignment shop to maximize chassis predictability.

Aerodynamic Enhancements: Managing Airflow

The R35's factory bodywork is efficient for high-speed stability, but it is not optimized for maximum downforce. At speeds above 100 mph, aerodynamics become a major factor in grip and driver confidence. Upgrading the front splitter, rear wing, and underbody components can generate tangible downforce without adding excessive drag—if properly designed.

Front Splitters and Canards

Adding a front splitter extends the flat undertray forward, creating a low-pressure zone that sucks the front end down. This improves steering response and front grip at high speeds. However, splitters can reduce front clearance—careful on driveways and speed bumps. Many splitters also include supporting rods to prevent flex. Canards (small fins mounted on the bumper sides) further manage airflow around the wheels and can help direct air to brake ducts. Look for a splitter that is engineered for the R35's specific bumper contour, such as those from Varis or Voltex.

Rear Diffusers and Wings

A rear diffuser manages air exiting under the car, accelerating it to reduce lift. Coupled with a rear wing, it balances the front downforce. Adjustable GT wings allow you to change angle of attack (AOA) to fine-tune rear grip. For a street-driven GT-R that sees occasional track use, a moderate AOA of 5-7 degrees is often sufficient. Stiffer angles generate more downforce but also increase drag, potentially reducing top speed. A functional rear wing should be mounted securely to the chassis, not just the trunk lid, to transmit loads properly.

Side Skirts and Underbody Panels

Side skirts help seal the airflow along the sides of the car, reducing turbulence and directing air to the diffuser. Underbody panels (flat floor) smooth the airflow under the car, further reducing drag and lift. Many track-focused R35s utilize full carbon fiber underbody trays. For street use, a partial underbody panel or just a diffuser upgrade may be more practical. The key is to ensure that all aero components are compatible and do not create unexpected lift or drag at different speeds.

Integrating the Upgrades: Achieving Balance

A common pitfall is upgrading components in isolation without considering the car's overall balance. For example, adding a very stiff rear sway bar without upgrading the front can lead to snap oversteer. Similarly, adding a massive rear wing without front aero can cause high-speed understeer. The ideal setup integrates sway bars, coilovers, and aero into a cohesive system. Start with coilovers and alignment, then add sway bars, and finally aero. Test the car at each step—preferably with data logging or a reliable stopwatch—and make small adjustments. A well-sorted R35 should feel neutral at corner entry, rotate slightly with throttle, and settle into a stable drift at high speeds. This synergy requires patience and tuning, but the result is a car that communicates clearly and inspires confidence.

Maintenance and Long-Term Care

Upgraded suspension and aero components require more frequent inspection. Sway bar bushings wear over time, coilover seals can leak, and aero components may crack if not properly reinforced. After every track day or 5,000 street miles, check the following:

  • Torque on all suspension fasteners (especially sway bar end links and coilover mounting bolts)
  • Condition of sway bar bushings and spherical bearings
  • Damping adjustment knobs for smooth operation
  • Alignment settings (camber and toe)
  • Condition of splitter and wing mounts (look for stress cracks)

If you frequently drive in rain or cold, consider protectant coatings for aluminum aero parts and stainless steel hardware. Many GT-R owners also upgrade to adjustable sway bar end links to prevent preloading the bars, which can cause erratic handling.

Conclusion: Unlocking the R35's Full Potential

The Nissan R35 GT-R is already a high-performance icon, but its chassis and aerodynamics can be further refined to meet exacting standards. Upgrading sway bars reduces body roll and allows you to tune cornering balance, while coilovers provide the foundation for precise damping and ride height control. Aerodynamic enhancements generate downforce that improves high-speed stability and driver confidence. The key to success is a systematic approach: start with coilovers and alignment, introduce sway bars, and finally add aero components. With careful adjustment and quality parts from reputable manufacturers, your R35 will reward you with sharper turn-in, better traction, and a more engaging driving experience. Whether on public roads or the race track, these modifications let you tailor Godzilla to your unique vision—and that is the true essence of personalizing a legend.