More than mass production, less than tuning.
Specially designed for FD & NA and discontinued sports cars.
The concept is "more than mass production, less than tuning". This mass-produced suspension kit was born as the highlight of the discontinued sports car update program for the RX-7 (FD) and the first-generation Roadster (NA). The lightweight body has a FR layout with a 50:50 weight distribution front to rear. The four-wheel double wishbone suspension... each part has been fine-tuned, focusing on the dampers, which are the key to handling, with the aim of drawing out the potential of the base car with a modern sensibility.
It combines nostalgia with modern precision and a flat ride feel to create a new riding experience.
The product is an assembly specification that incorporates mass-produced dampers and springs with genuine upper mounts/bump stoppers. We would like owners who have been driving their beloved cars for many years, or who have just purchased their dream car, to experience the fresh driving feel.
<Product features>
Fixed damping force twin tube damper
The damper that controls the roll speed has a simple structure and adopts a fixed type that is advantageous for the rise of damping force from the very low speed range (piston speed 0 to 0.1 m / sec).The damping force on the extension side is increased, the contraction side is suppressed to a low level, the posture of the car is stabilized, and the thrust from the road surface is suppressed.
Dedicated spring
The spring that determines the vehicle height and roll amount is designed with an emphasis on the connection with the bump stopper during the stroke process.The vehicle height is set to -5mm for FD, which is mass-produced and does not assume the installation of a snow chain, and -15mm for NA, which secures the same clearance.The spring constant is 110 to 140% of the mass production ratio.
Genuine upper mount / bump stopper
For genuine parts that cannot avoid aging deterioration, select the final model (RX-7 = FD6 type, Roadster = NB) for both cars.It refreshes the entire suspension and contributes to improving the ride quality.
For RX-7(FD)
For Roadster (NA)
<Spec sheet>
* Click to open the enlarged image.
The graph plots the damping force for every 0.05 m/s of piston speed for easy comparison, but the actual curve is smooth.
<Street suspension kit development story ... What's New BLOG>
<Product compatibility table>
■Street SUS.Kit Mass-produced twin tube damper with fixed damping force + mass-produced spring with genuine upper mount and bump stopper installed. Assembly product
| Car name | 適合 車 種 | part number | Tax-included price (Price without tax) | Spring constant (Unit N / mm) | Vehicle height reduction amount | Codes | Reference work Time |
|---|---|---|---|---|---|---|---|
| RX-7 | FD3S | MFD7750 | 195,800 JPY(TAX+) (¥ 178,000) | Fr: 53.2N/mm (113% of mass production ratio) Rr: 40.0N/mm (114% of mass production ratio) | Mass production ratio -5mm | F | 2.0h |
| Roadster | NA8C / NA6CE | MNA7750 | 162,800 JPY(TAX+) (¥ 148,000) | Fr: 36.3N/mm (133% of mass production ratio) Rr: 23.3N/mm (142% of mass production ratio) | Mass production ratio -15mm | F | 2.0h |
