while i am in here thought i may as well as this also.
Are spacers car specific?
Having never put them on a car before I havent a clue about anything to do with them.

I want to push the Stilo blades out a tad on my Coupe as they sit deep into the arches ate present, think maybe a 10mm spacer to to help it along.

anyone help out with any clues on them please

There are universal ones but dont use them as they are not hubcentric and you need hubcentric for a spacer that thick.

I would look for a Fiat specific spacers or get some made. You also need wheel bolts 10mm longer or convert to studs. Legally you also need a certification for these modifications too.

Hubcentric spacers require the inside of the spacer to be machined exactly to the OE spigot size and also to the wheel. The ones made for my coupe were like this.

What is the size and offset of the stilo wheels? I want to compare them to my 18's so I can modifiy the spacers I have. I think mine stick out just a little too far.

Get Eibach TUV ones and you're sorted.

http://www.venommotorsport.com/product_details.php?id=1111&manufacturer=Eibach&category=Wheel

15mm a side