Be very interest to hear if Daron has fitted one for a customer yet.
I have heard that bigger intercoolers can add lag and move all the power into a bigger single hit like a old skool big power turbo...
Nothing, Nothing, Nothing, Nothing, Still Nothing BANG all the power in one hit!
I dont think the pipework would be too much of an issue as I imagin there's quite abit of pipework running a split setup to be honest but I can see Hippos concern about cooling, as there isnt much of the rad on show if any in the shots Ive seen of all 3 intercoolers I know about (Forge, G-Tech and the one TMC sells), think there might be at least one more.
As for gains, I read a issue of Fast Car where Forge had their demo car featured (Shockingly bad mag and worse still was the feature) which at the time was sporting:
Forge Induction Kit with Silicone elbow
Forge BOV
Forge Actuator
Forge Front mounted intercooler
and remapped
They claimed it made 190bhp on standard car and exhaust, which I guess is possible, but 190bhp ish is about the limit of the standard turbo so Im not sure if a full exhaust would have brought much to the table, still when you think about it GTTunings stg2 kit basically uses a slightly altered TMC, uprated actuator and sometimes induction kit to get 180/190bhp ish so maynot be too far from the trueth