James,
Morgans evolve, so it is possible that your S1 differs from later cars.....
This photo of an Aero in build was taken last year.
The plastic air filter container pulls air in from above, the air intake is in the wing, behind the off side headlamp area. It looks very much as though filter remval is still wing off.
I don't have a picture of a Plus 8 in build, but had a look at one recently. The air filter housing is clearly a Morgan fabricated part and has a large flat pannel airfilter fitted that is removed by removing a panel under the wing: the wing doesn't have to come off. The air intake is through louvres on the wing of the car, behind the front wheel.
So, it seems that the air box and filter differs between models and the indicator is probably the presence of louvres on the side of the off side wing, or not.
Jays can, hopefully, confirm if my analysis is correct...
This probably doesn't help much...
Also, see my thread on Servicing Costs.
