I always liked the sequential HKS valves. They are pull type so pressure is always keeping them close under boost. You never have to worry about leaking, adjusting or changing springs/diafragms.
Turbosmart makes adapters from just about any flange to any flange and HKS makes 3 size recirculation fittings. Maybe a vendor could get you one close to the price of that push type vale you linked. Might as well get something you won't have to mess with again and will meet future possible power increases. Just a suggestion.
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