RS 200 wheel spacer advice

[Boomer]

Looking to put a wheel spacer kit on my RS 200, Any advice on which brand or kit? and what thickness?
Like everyone else just looking to fill the arches but I don't want to wreck the handling.

 

[197.]

Most people go for 20mm spacers as they fill the arches nicely. I found that the car tramlined and torque steered more however.

 

[mossyv6]

I have 20mm all round and the car drives spot on and no team lining at all.
Mine are the BIMECC ones from eBay for £50 a pair with longer bolts.