am about to replace the two front air suspension struts, and I was thinking that I may as well replace the lightweight 31mm anti sway bars with some thicker heavy duty ones, in an attempt to improve the handling, has anyone done this in the past and noticed an improvement, or am I chasing rainbows ?

I don't think you will get a noticeable difference... ARB rigidity is linked to damper settings and airspring rate and you may make it worse in other areas...

Biggest improvement I had with my old one was to replace the rear shocks with genuine replacements, made a massive difference to the whole car...  Pete
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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
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2012 L322 Autobiography 5.0 Supercharged Ipanema Sand Sold
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Sold
2002 L322 Vogue 4.4 V8 Epson Green (Fatty Offroader) Sold
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