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.
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.
Will I fit in this seat?
Send us your height and waist size and we will confirm the fit. how a seat actually feels to sit in is a different question, and our showroom team sit in these seats every day, so call us and we will give you the honest answer.
What does showroom stock mean?
It is physically on our Nottingham showroom floor right now, so you can come and sit in it before deciding. If you want us to hold it for a visit, call ahead and we will keep it on the floor for you.
What do I need to fit it to my car?
The car-specific frame for your vehicle, plus a sliding runner if you want fore-and-aft adjustment. Our guide on base mount versus side mount walks through the whole stack, and tell us your car and we will quote the full kit.
How do I know it will feel right, not just fit on paper?
Makers publish widths and weights, never feel, and two seats with identical numbers can feel nothing alike. We keep the ranges on display in the showroom, you are welcome to come and sit in them, and our head support measurements guide shows the kind of real-world data we collect.
Is this a base mount or side mount frame, and do I need side mounts too?
This is a base mount frame, made to bolt straight to your car's original floor points. No separate side mounts are needed. It is sold per seat, so order two if you are fitting a pair.
