SEAT MOUNT LH 99-05 MAZDA MIATA NB LOW

The SPARCO Seat Mount LH 99-05 Mazda Miata NB Low (model 600SB255L) is a left-hand driver-side seat adapter bracket engineered to integrate Sparco 600 Series racing seats into first-generation (NB) Mazda Miata chassis from 1999 through 2005. This bracket serves serious track drivers and enthusiasts who prioritize proper seating geometry and safety harness positioning during competitive driving and performance-focused road use.

Constructed from steel with a durable black powder-coat finish, the bracket is engineered to withstand high-lateral forces encountered during cornering and sustained track sessions while resisting corrosion in varied weather conditions. The "Low" positioning specification indicates this mount places the seat at a lower ride height than OEM configuration, a critical factor for drivers operating within tight safety cages or managing center-of-gravity considerations in heavily modified vehicles. At 7 lbs, the bracket adds minimal unsprung weight while maintaining the structural rigidity necessary for motorsport applications.

This adapter is the correct choice for left-hand driver configurations in NB Miatas prepared for road racing, time attack, autocross, or high-performance driving events where factory seat mounting is inadequate. Sparco's 600 Series seats paired with this OEM-specific bracket provide repeatable positioning and harness anchor alignment that stock seating cannot deliver. Proper installation requires careful attention to vehicle-specific mounting points and may require professional fitment in modified chassis.

The Mazda Miata NB platform (1999–2005) is among the most popular bases for grassroots motorsport builds, and Sparco's dedicated bracket lineup reflects deep market knowledge of this chassis. This left-hand mount is a single-piece installation (sold individually) and requires the corresponding right-hand bracket for full dual-seat replacement in competition or street applications.