Tein GSM74-81SS2 Street Basis Z Coilovers for 2006-15 Mazda MX-5 NC RWD

Vehicle Fitment

• 2006-2015 Mazda MX-5/Miata (NC/NCEC, RWD; Base, Club, Sport, Grand Touring, Special Edition, SV)

Features

• TEIN Street Basis Z twin-tube coilover suspension kit for street performance
• Thread-type adjustable ride height via ZT-coated spring seats
• Fixed damping for consistent everyday driving comfort
• OEM upper mounting points reused for precise fitment
• Powder-coated damper bodies resist corrosion and wear
• Durable steel construction with enhanced reliability
• Delrin thrust washers for smooth height adjustment
• Improved cornering stability and lowered center of gravity

Specifications

• Part Number: GSM74-81SS2
• Series: Street Basis Z Coilovers
• Damping Adjustment: Fixed (non-adjustable)
• Ride Height Adjustable Range: approx. -14 mm to -91 mm front, -15 mm to -55 mm rear
• Recommended Ride Height Drop: approx. -35 mm front, -30 mm rear
• Spring Rates: Front approx. 5.5 kgf/mm, Rear approx. 3.5 kgf/mm
• Upper Mounts: OEM reuse (front & rear)
• Drive Type: Rear-wheel drive only
• EDFC Compatible: No

Included Components

• 2x front coilover assemblies
• 2x rear coilover assemblies
• 4x ride height adjustable spring seats
• 4x spring lock collars
• 4x dust covers (some applications reuse OEM covers)
• 4x rubber bump stops
• 4x Delrin thrust washers
• Pair of hook spanners
• 1x instruction manual

Product Description

The Tein Street Basis Z Coilover Kit (Part No. GSM74-81SS2) is a tailored suspension upgrade for 2006-2015 Mazda MX-5/Miata NC (NCEC) roadsters. Designed around a twin-tube damper structure with threaded ZT-coated spring seats, this kit lets owners easily adjust ride height for a lowered stance while retaining a smooth, compliant ride for daily driving. Unlike adjustable damping systems, the fixed-damping setup simplifies tune-up and ensures consistent performance without the need for frequent adjustments.

With OEM upper mount compatibility and durable powder coatings on all damper bodies, the Street Basis Z kit delivers improved road handling and reduced body roll without compromising reliability. The included hardware - such as height-adjustable collars, bump stops, and thrust washers - makes installation straightforward for all four corners. Whether you're enhancing handling or just want a more aggressive stance, this coilover kit offers solid performance, quality construction, and long-lasting durability for your MX-5 NC.