The Endurance Motorsport Classic Mini Sub-frames (part MAM2A18U297) are steel subframes for installing aftermarket bucket seats in a Classic Mini. The Classic Mini’s floor mounting positions are specific to the era and nothing about them lines up with modern seat hardware without an adapter. These subframes bolt to the Mini’s original floor points and present a standard side-mount-compatible top face for the seat installation above.
At £87.50, these are sold as a pair covering driver and passenger positions in one order. The Classic Mini has a narrow cabin and the seat choice matters: shells wider than the car’s sill-to-tunnel gap cause problems regardless of how good the subframe is. The subframe is only one part of a Mini bucket seat build; the seat shell width, the side mounts, and any runners all need to be compatible with the Mini’s cabin width and floor topology.
Contact us before ordering if you want to discuss the full installation stack for your Mini. We have done enough Mini bucket seat builds to have a view on which combinations work and which ones leave you with fitment problems on an otherwise good seat.






