Jass Performance Mazda MX5 Mk1/Mk2 Sparco Adapter Rails For Sparco Sprint And R100 Seats

The rails are zinc-coated and powder-coated, their installation is discrete, however, they can’t be spotted from above.

Many of us have tried fitting Sparco Sprints in an MX5 to realise, they are not exactly direct fit, nor provide much (more) room. They need redrilling, adapting the rail to the left seat to match the width and while a defoamed OEM seat can sit at the same height and lean lower, these are not an option for really tall drivers on rails. So we provided a solution, adapter rails, with the following features:

• Bolt-on the installation of both seats
• Left seat bolt in the central position (to the steering wheel)
• Minimal rail height below 5mm.
• Compared to using the OEM fixing positions, they allow the seat to move the 15 available millimeters to the furthest back (two more clicks). With removed rear trim (the limiting factor) this gives additional good leg freedom.
• While moving backward (the additional 15mm), the seat dives further down as of the angle of the rails, compensating for the added rails thickness (5mm).

Compatibility: 

• NA (MK1)
• NB (MK2) 

They won’t directly fit the NBFL rails with an integrated (welded) seat belt bracket when used with R100 seats!