I don't know the specifics about the injectors so I'll let Motion Lab answer. This was with Berk high flow cats and the GReddy Ti C exhaust 2.75" pipes.
My baseline for the car was 300hp and that was consistent, performed on two different dynos. That was with AEM intakes, Berk HFCs, Akrapovic exhaust and no tune.
Not too sure about slippage, maybe just a hiccup....boost doesn't taper off.
