PCI Slider Left Side Seat Mount - NA/NB Miata (90-05)

Take your 1989-2005 NA/NB Mazda MX-5 (Miata) driver cockpit to the next level with the PCI Pro Car Innovations Slider Seat Mount SM-90MX5-L-S2 (left side). Built from a single piece of 3 mm (1/8″) carbon steel that is laser-cut and CNC-bent for ultimate rigidity and light weight, this mount replaces the guesswork and fabrication often associated with aftermarket seat brackets. According to the manufacturer, its geometry offers equal or greater strength than conventional 3/16″ welded mounting systems. 

The heavy-duty S1 sliders included in the kit mount with four bolts per slider, doubling the mounting strength of typical two-bolt systems. This gives you confident fore/aft adjustment, smooth travel, and real harness-system readiness. The mount supports 5-point and 6-point sub-belt/harness systems, so whether you’re gearing up for club track events or building a serious street/track Miata, you’re covered. 

With width adjustability from ~14¾″ (375 mm) to ~17½″ (445 mm) for the standard side mount (minus 1″ for MX-5 fitment), and ~9 ⅝″ (~245 mm) of front-to-back travel, you’ll be able to fine-tune your seating position for optimal ergonomics. The gloss black metallic powder-coat finish on the side mounts, zinc-plated Grade 8 hardware and included black nylon spacers give this mount both premium looks and functional durability.

Whether you’re installing a lightweight race seat, a harness-equipped bucket, or simply improving your driver setup, the SM-90MX5-L-S2 offers adjustability, strength and a factory-mount clean install to get you on track quickly—and with confidence.