131mirafiori forum

wanted the 2 piece of metal that mounts the wheel arch to the front  mudguard

Do you mean these three tags that are spot welded to the wing as when I replaced the old wings I made my own, takes a while but they are spot on.
Fiat originally sold the standard wing and the sport wing was ?50 more exspensive,

yes for those.i cant find to buy new ones??

at the rear there is not from them???

And you need three of them  :) ;)

will find to buy new ones???

Couldn't you make something yourself? After all, it's a small bended strip with a little hole for the screw.
I think it's reasonable easy to duplicate and weld.

yes its not difficult .will make new ones myself

The best way is to remove an old one (with a spot weld drill), its usually only held on with a spot weld either side and then flatten it with a hammer and then draw round the outline, then make new one to fit in outline and bend into required shape.
To get correct position on the wing for the three tags just lay plastic sport arch onto the wing and mark centre of each slot on the plastic arch against the wing with a marker pen.
I advise you do one at a time and tack on one at a time and check as you go.
The rear plastic arches where attached to the body with screws with square holes and nylon inserts in the metal arch of the body originally.

If the old one is not rusty, why not re-use it?

Somehow i am under impression that 131racing hasn't go any of them. Just the fender (s).

Best thing to avoid any future corrosion (which will happen when using screws) is to omit all screws and glue the arch to the fender. I'm sure if there were high tech glues available in the 70ies, Fiat would have used them themselves instead of screws. Something like Sikaflex should also be available in the UK.

I would stay with the screws and original nylon inserts on the body because at least you can remove them and keep an eye on the metal now and then, if you bond them on it will just rot behind the plastic.

I totally agree. Best is to put some grease on the screws.

No, it won't. The bad thing is (galvanic) contact corrosion as happens when you have different kinds of metal (e.g. aluminum and steel) being mated. When you glue plastic onto painted metal, no contact corrosion can develop and also no condensate (humidity can enter, however, if the arch is just screwed to the fender). It may rust from the inside, sure, since it's a Fiat. But then you will have to throw away the fender in any case, be the arch screwed on or glued on.

See here, this is a Mercedes fender (the rust protection used by the factory on this model was perfect) that had wheel arch chrome trim (fixed with screws) when I bought it. This is what lurked beneath: