I’m still on the fence. I can only see one fuel cap thing :p
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Looking at the back of a car you can tell it's a LB because the louvre panel has three supports between each slat. Transformer/Hawk/Lancia only have two. Not sure about the Corse/Allora/Napiersport versions though a quick trawl of photographs would help..
Guy
Ducted bonnet option on The LB
My Corse I, the fuel filler is in the B post.
I think all other types are "via" the rear clam
I have adjusted the door since then so the seam lines up!
Attachment 19221
It's something that got passed down from the Allora, Corse' are similar.
I think it does help for the anti sag, yes and I can't speak for the others but the louvre is not pushed in tight to the aperture so this doesn't cause the sag.
The air pushing down on the louvre from the rear spoiler is what causes the sag in the case of the LB which is why they have a support bracket between the canopy and the lower louvre.
Without this bracket when travelling at speed the louvre can be pushed down & touch the rear canopy.
Attachment 19222
Something else you can add on when listing the spec of your car: "3.2 GTA...ITBs....4-pots all round...Nitrons....anti-sag...." ...although some may think you've started listing family members when you get onto that last one.