I don't know what these are really so you'll have to do a bit of research. They are "Heavy Duty" dampers. They were on the car when I bought it last year off James Joyce, (previously Ian Highfield and Hamish Franklin).

They worked ok, just very firm and very low, obviously a track set up. They were wearing H&R springs and to accommodate those some bespoke platforms had been made but the rear set made contact with the drive shafts when I lifted the car. See photo.

Part numbers are visible in the photos, that's all I can tell you really.

£100, cash on collection preffered. Could package for courier collection.

Call Simon on 07713 515 059 if you are interested.
Andover, Hampshire, UK.