These Sparco sub-frames (part 00499075-1739) mount base-mount sport seats into the Seat Leon Mk1, covering cars produced from 1999 to 2004. They fit to the Leon’s original floor mounting points without drilling or fabrication.
The Mk1 Leon has a strong following in UK club motorsport and track day use, particularly the Cupra and 1.8 20VT variants. The standard seats provide limited lateral support at speed, and a sport seat fitted at the correct height changes the driving position and feedback considerably.
Steel construction, 345mm x 271mm bolt pattern. These frames are compatible with base-mount seats from Sparco, OMP, and Corbeau. The Sparco part number refers to the frame manufacturer, not the range of compatible seats. If you are fitting an OMP or Corbeau base-mount seat, these sub-frames will work with it.
Sold as single frames, handed by side. The driver and passenger sides are shaped differently to suit the Leon’s floor geometry. Select the RHD driver side or RHD passenger side as required. Getting the variant wrong will mean the frame does not sit level.
For base-mount reclining seats only. Side-mount FIA competition bucket seats use a separate mounting system and are not compatible with these frames. If you are not sure which type your seat uses, the Fixing Type attribute on the seat listing will say either base-mount or side-mount.
























