A'PEXi - N1 Evolution Damper - Mazda RX-7 [FD3S] (1992-2002)

● φ46 Linear Piston

The N1 Evolution Damper features a completely redesigned φ46 resin-bonded piston, developed exclusively for this system. Considering real-world street conditions such as rutted pavement and consecutive road gaps, A’PEXi adopted a linear port design that maintains linear damping characteristics up to approximately 1.5 m/s piston speed.

By allowing the suspension to move proactively, the system achieves both sporty, precise control and a supple ride quality without harsh impact. The piston ring uses a specially formulated resin material, significantly reducing friction while extending service life and suppressing abnormal noise, greatly improving overall quietness and refinement.

● Pillow Ball Upper Mount

All N1 Evolution Damper models are equipped as standard with high-rigidity pillow ball upper mounts. A thick, CNC-machined duralumin upper plate combined with a high-precision NMB pillow ball joint ensures smooth, stress-free operation while accurately responding to even minimal suspension movement.

To further enhance ride comfort, the system incorporates revised bump rubber shapes and extended damper stroke on the cylinder side, achieving an exceptional balance between direct handling response and ride compliance.

For MacPherson strut (inverted) applications, a camber-adjustable pillow ball upper mount is included as standard equipment.

● High-Quality Materials

Performance and reliability take absolute priority in the N1 Evolution Damper. With uncompromising attention to detail, A’PEXi selects the best possible materials and manufacturing methods, regardless of cost.

The damper body utilizes a high-strength steel monotube construction, offering outstanding rigidity and durability. Rather than decorative finishes, the surface is treated with zinc plating, reducing galvanic corrosion and ensuring long-term resistance to harsh environments.

The N1 Damper Series was also among the first in the market to adopt full-length height adjustment, a feature now widely considered standard.

● Damper Fluid

Developed exclusively for this system, the N1 NEW Damper Fluid is truly the lifeblood of the N1 Evolution Damper. Designed to resist heat fade, improve break-in characteristics, and maintain stability over extended use, it delivers consistent damping performance even under extreme conditions.

Proven through A’PEXi’s extensive experience in GT racing, this high-performance fluid is an essential element of the N1 Evolution Damper’s core performance and without it, the true nature of the system cannot be fully realized.