Tein SKM64-S3B00 S.Tech Lowering Springs for 90-98 Mazda Miata (NA6C / NA8C)

Vehicle Fitment

• 1990-1998 Mazda Miata (NA6C 1.6L; NA8C 1.8L; manual, RWD, all trims)

Fitment Notes

• Front drop ≈1.1" (28 mm); rear drop ≈0.7" (18 mm)
• Progressive-rate springs designed for OEM or OE-replacement dampers
• Factory bump rubber must be trimmed--follow Tein's NA6C/NA8C instructions

Features

• Chrome vanadium SAE9254V construction with green epoxy finish
• Progressive spring rates: 4.2 kg/mm (~235 lb/in) front, 3.0 kg/mm (~168 lb/in) rear
• Enhanced handling and reduced body roll while preserving ride comfort
• Manufactured in Japan, ISO-certified quality control
• Designed for consistent performance with <5 mm sag over time
• Includes silencer rubber for noise reduction
• 1-year warranty against sag/deformation and defects
• Proven balance of lowered appearance and OEM-like ride comfort

Specifications

• Part Number: SKM64-S3B00
• Material: Chrome vanadium spring steel (SAE9254V)
• Front Drop: -1.1" (28 mm); Rear Drop: -0.7" (18 mm)
• Front Rate: 4.2 kg/mm; Rear Rate: 3.0 kg/mm
• Finish: Green powder coat
• Warranty: 1-year manufacturer (includes sag >5 mm coverage)

Included Components

• 2x Front progressive-rate springs
• 2x Rear progressive-rate springs
• Tein bump rubber trimming instructions

Product Description

The Tein SKM64-S3B00 S-Tech spring kit offers a sporty yet refined lowering solution for Miata NA models manufactured between 1990 and 1998. Engineered from high-grade SAE9254V chrome vanadium steel and finished with green epoxy, these progressive-rate springs lower the front by ≈1.1" and rear by ≈0.7", enhancing handling crispness and reducing body roll while preserving ride comfort.

Tailored for OEM and OE-spec dampers, the kit ensures stable dynamics without harshness. It includes bump rubber trimming instructions to prevent binding. With Japan-built quality, silencer rubbers to reduce noise, and a 1-year warranty covering sagging beyond 5 mm, the SKM64-S3B00 is the ideal balance of style, performance, and durability.