Help remove turbo lag on the MY06 Subaru WRX using a MRT power-up kit

The car that really surprised us was a current MY06 Subaru WRX equipped with a relatively mild MRT power-up kit. Nothing particularly groundbreaking in terms of mods but, jeez, the result was brilliant. Forget typically laggy Subaru turbo engines, this engine had the punch of a late-model Saab or Audi at low revs and continued to make good power to around 7000 rpm. It was responsive, wonderfully flexible and damn fast in the cut-and-thrust of normal driving. A great example of effective turbo matching and an intelligent engine tune.