i have a Blitz fmic kit, with the pipe running back under the intercooler into the stock positions. U may think this is longer but no way, it is actually one of the most effective piping designs u can have.
Here is a dodgey diagram(hey it's 1.30am, i'm tired..lol)
As you can see with the setup the Blitz kit uses, unlike most coolers the inlet and outlet sides on the cooler are opposite. Why do this? Well the pipe that goes from the right hand side of the cooler to the intake manifold is the shortest possible route, which means the most important cold air will stay cooler than having it run across the other side and halfway across the engine bay.
THe pipe from the turbo to the cooler is longer than other kits where it would normally enter the cooler on the passenger side, but as this air is hot it actually cools down slightly as it must travel along the straight pipe goin under the cooler....alot of air hit this pipe which cools it down, which means the hot air from the turbo is actually being slightly cooled down before it actually enters the intercooler
Trust me their is no extra lag in this setup, just a huge difference in the delivery of power. It is the most effective way i believe to have piping setup for an rb20/25 engine.