Ohlins MAS MI20S1 Road & Track DFV Monotube Coilover Kit 1990-2005 Mazda Miata N

Vehicle Fitment

• 1990-1997 Mazda Miata / MX-5 (NA)
• 1998-2005 Mazda Miata / MX-5 (NB)

Fitment Notes

• Ohlins spherical bearing upper mounts are included with this kit at both front and rear - OE top mounts are not required and not used with this application
• Front ride height and spring preload are independently adjustable; rear ride height, spring preload, and shock length are independently adjustable
• Target ride height is approximately 15mm lower than OE at both front and rear; actual lowering will vary based on spring preload setting, vehicle weight, and tire/wheel combination
• Dampers are fully rebuildable - Ohlins service centers can revalve, rebuild, and service the units to extend their working life
• Professional installation recommended; installation instructions are provided with the kit
• Sold as a complete coilover kit - springs, spherical bearing mounts, and mounting hardware included

Features

• Patented Dual Flow Valve (DFV) technology - exclusive to Ohlins Road & Track; provides matched damping characteristics on both compression and rebound strokes, allowing the tire to return to the road surface more quickly after any input for improved grip, traction, and cornering response
• Single-knob damping adjustment simultaneously changes all four damping parameters - high-speed compression, low-speed compression, high-speed rebound, and low-speed rebound - allowing fast mode switching between road comfort and track stiffness
• 20+ click individual damping adjustment range per damper for fine-grained, corner-by-corner tuning of suspension response and balance
• Monotube damper architecture delivers faster thermal management, more consistent damping under repeated inputs, and greater sensitivity at low shaft speeds compared to twin-tube designs
• Ohlins spherical bearing upper mounts - included front and rear - replace the OE rubber mounts for sharper steering response, reduced compliance steer, and more consistent camber behavior under load versus rubber or pillow-ball mounts
• Independent front spring preload and ride height adjustment; independent rear spring preload, ride height, and shock length adjustment provide more precise corner-by-corner setup capability than a single-adjustment collar design
• Application-specific spring rates (80 N/mm front / 60 N/mm rear) tuned specifically for the NA/NB Miata platform's weight distribution and suspension geometry
• Fully rebuildable design with dust covers extends service life and allows revalving at an Ohlins authorized service center to adjust damping characteristics for different applications or driving styles
• All dampers corrosion-tested to ISO 9227 standard for long-term durability in road and track environments
• Backed by Ohlins' worldwide 2-year limited warranty

Specifications

• Part Number: MAS MI20S1
• Series: Ohlins Road & Track (R&T)
• Technology: Patented DFV (Dual Flow Valve)
• Damper Design: Monotube - Fully Rebuildable with Dust Covers
• Damping Adjustment: 20+ Click, Individually Adjustable Per Corner
• Adjustment Type: Single-Knob - Adjusts All 4 Damping Parameters Simultaneously
• Front Ride Height Adjustment: Independent Spring Preload and Ride Height
• Rear Ride Height Adjustment: Independent Spring Preload, Ride Height, and Shock Length
• Target Ride Height: ~15mm Lower Than OE (Front and Rear)
• Front Spring Rate: 80 N/mm (458 lbs/in)
• Rear Spring Rate: 60 N/mm (343 lbs/in)
• Upper Mounts: Ohlins Spherical Bearing Mounts - Included Front and Rear
• Corrosion Testing: ISO 9227
• Warranty: 2-Year Worldwide Limited
• Sold As: Complete coilover kit with springs, spherical bearing mounts, and mounting hardware

Included Components

• 2x Front Monotube Strut Assemblies with Springs
• 2x Rear Monotube Shock Assemblies with Springs
• 2x Front Ohlins Spherical Bearing Upper Mounts
• 2x Rear Ohlins Spherical Bearing Upper Mounts
• Mounting Hardware Kit
• Installation Instructions

Product Description

The Ohlins MAS MI20S1 is a complete Road & Track coilover suspension system engineered specifically for the 1990-2005 Mazda Miata / MX-5 across both the NA and NB generations. The system is built around Ohlins' patented Dual Flow Valve (DFV) technology - which provides matched damper fluid flow characteristics on both compression and rebound strokes - allowing the tire to return to the road surface faster after each input for sharper lateral grip, more balanced cornering, and a more planted feel than conventional coilover designs. Application-specific spring rates of 80 N/mm front and 60 N/mm rear are tuned to the NA/NB Miata's weight distribution and geometry for optimal performance straight from installation.

A key distinction of the MAS MI20S1 versus many other R&T kits is the inclusion of Ohlins spherical bearing upper mounts at both front and rear - replacing OE rubber mounts entirely for sharper steering response and more consistent camber behavior under load. Front spring preload and ride height are independently adjustable; rear spring preload, ride height, and shock length are also independently adjustable, offering a higher degree of corner-by-corner setup precision than a single-collar design. The monotube dampers are fully rebuildable with dust covers and can be revalved at any Ohlins authorized service center. All dampers are corrosion-tested to ISO 9227 and backed by Ohlins' 2-year worldwide limited warranty.