Hey guys, I've recently fallen back in to Evo ownership having bought a lovely White IX GT Wagon. It's a 5 speed manual in White and is currently running 550hp. The car has a fully built engine, radium fuel system, Haltech ECU and is specced up for 600hp ish. I am sending the car to Evotune next week and Jamie is going to map her up on Haltech and advise on the upgrade path to go 650 / 700. He's suggested going to 2.3 and changing the Turbo, I just wondered if anyone has feedback on what will be the least laggy / least boost needed to run this level of power. I'm currently a GTR owner and have done a lot of research into those cars, but have been out of the saddle wrt Evo ownership for a number of years, so any advice would be appreciated.