H. Drive R Spec coilovers are engineered for Japanese vehicles, featuring a two way monotube design. This dual adjustment capability allows drivers to precisely tailor the suspension response, optimizing performance for both track focused applications and daily driving needs. With an emphasis on responsive handling and stability, the R Spec coilovers enhance vehicle performance, offering refined control that complements a range of driving environments.
R Spec Features
- 2 Way Monotube Type
- 30 Levels of bump adjustment | 30 Levels of rebound adjustment
- Pillowball top mounts
- Practical use for circuit race
- Designed with a large diameter piston at 50mm, 2 ways system (some vehicles)
- Camber adjustable top mounts (available on select models)
- Large 50mm piston (select models)
- Enhanced spring preload
- Custom spring rates available
- Adjustable ride height
- Lightweight aluminum upper mount
- Light weight aluminum sheet
- Lower mount locking ring for secure fit
- Rigid bracket coated with special paint to achieve durability
- Aluminum bracket coated in black anodized paint to improve corrosion resistance
- Protective dust boot to shield damper seals
Included height adjustment wrench
The H. Drive R Spec coilovers are engineered for the track enthusiast, delivering unmatched precision and performance for Japanese vehicles. Featuring a two way monotube design with independent bump and rebound adjustment, these coilovers offer precise fine tuning for any track condition. Built for maximum stability and control, the R Spec is the perfect choice for those pushing the limits of their vehicle’s capabilities.
- Supplied Spring Rates may differ from advertised
- Please note that not all vehicles use camber plates in the front and/or rear. Some vehicles reuse OEM upper mounts.
- The vehicle ride height can be lowered 25mm to 95mm
- The H. Drive coilovers feature a high performance monotube damping system. Due to its enlarged valve and integration of gas and oil within a single chamber, a slight noise may occur when driving slowly over rough terrain, indicating normal damper operation.
Reservoir Shock
The H. Drive R Spec coilovers incorporate an external reservoir, which is designed to improve both damping consistency and heat dissipation. In high performance settings like track days, the suspension is subjected to extreme forces that can generate heat and reduce the damping performance. The external reservoir increases the coilover’s oil capacity, providing additional space for the damper oil to expand as it heats up. This larger volume allows for better heat dissipation, preventing the oil from overheating and maintaining stable damping performance. Additionally, the reservoir offers separate nitrogen and oil chambers, which helps minimize aeration (formation of air bubbles in the oil) that could have an affect on the damping force consistency.

Independent Bump and Rebound Adjustability

Ride Height Adjustability

Camber Adjustability

Large 50mm Piston

Forged Aluminum Upper Mounts & Sheets

Corrosion Resistance

Coil Springs

Premium Quality Oil
The R Spec coilovers utilize specially formulated damper oil, optimized for consistent performance across various temperatures. This oil maintains its viscosity under high stress conditions, ensuring stable damping force and reliability in both daily use and high-demand track scenarios. The premium oil’s resistance to thermal breakdown contributes to extended damper life and dependable performance over time.
Nitrogen Pressurized Dampers
R Spec coilovers are nitrogen pressurized, minimizing oil aeration to maintain steady damping force during rapid damper movements. This pressurization prevents bubble formation, ensuring consistent damping and improved stability, especially under aggressive driving conditions. This feature supports durability and performance consistency for both street and motorsport applications.

Spring Rate
