Jass Performance Seat Lowering Slider Rails For Mazda MX-5 Miata (ND) And Fiat Spider 124

The Jass Performance Seat Lowering Slider Rails for Mazda MX-5 Miata (ND) & Fiat 124 Spider are designed to provide a practical seating solution for taller drivers, delivering a significantly lower driving position while retaining full seat functionality. Engineered for a straightforward bolt-on installation, these rails lower the seat by up to 48mm (1.9 inches), improving headroom, comfort, and overall driving ergonomics without compromising seat adjustability.

Compatible with both standard OEM and Recaro seats, the rails maintain the factory sliding mechanism, making them ideal for shared vehicles or drivers who regularly adjust seating position. Manufactured with a heavy-duty, precision-engineered design, every contour and mounting point is carefully developed to maximise strength, support, and fitment to the vehicle floor.

Key Features:

• Lowers the seat by up to 48mm (1.9 inches)
• Retains full OEM-style seat slider adjustment
• Direct bolt-on installation with no permanent modifications required
• Compatible with OEM and Recaro seats
• Heavy-duty construction for long-term durability
• Fully reversible installation
• Available for left- and right-hand drive vehicles
• Optional Fine Drop Adjustment Kit available for adjustable lowering heights

Benefits:

• Increased headroom for taller drivers
• Improved seating position and driving ergonomics
• Better visibility beneath the rear-view mirror
• Comfortable fit without sacrificing adjustability
• Easy home installation with basic tools
• Ideal for shared vehicles with multiple drivers

Vehicle Compatibility:

• Mazda MX-5 Miata (ND) – all facelift models with standard seats
• Mazda MX-5 Miata (ND) Recaro – all facelift models
• Fiat 124 Spider

Technical Information:

• Preset seat drop: 48mm (1.9 inches)

Optional Fine Drop Adjustment Kit allows intermediate drops of:

• 33mm (1.3 inches)
• 38mm (1.5 inches)
• 43mm (1.7 inches)
• 48mm (1.9 inches)

Rails are side-specific:

• Left side for driver seat in LHD markets (USA, EU etc.)
• Right side for driver seat in RHD markets (UK, Japan, Australia etc.)
• Supplied as a single-seat kit (order two kits for both seats)

Optional Upgrades:

Backrest Rising Kit
Designed to improve upper-seat ergonomics after lowering the seating position. This upgrade raises the backrest to better align the headrest, speakers, belt guides, and side supports with taller drivers.

Fine Drop Adjustment Kit
Includes precision aluminium shims that allow the seat height to be adjusted in 5mm increments between 33mm and 48mm. Particularly useful for drivers who require a less aggressive drop or for vehicles shared between drivers of different heights.