Hmm, I've found the limit varies wildly between different cars and how they are set up if they are the same model.
Examples: Normal family saloon won't pull more than about 0.9g before it starts to understeer like a canal boat, standard MX5 on road tyres will pull about 1.1g, slap some better shocks, geo, lower it and track tyres and you'll touch 1.4g. Well set up kit car on slicks, 1.6-1.7g. Big difference in cornering speeds there!
The Trophy dampers are pretty posh, those alone will make it significantly quicker than a standard one.
Still, they are a lot of money for what they are, I'd defo have one over a standard 172/182 if they were the same price though!