So I am planning to upgrade the turbo in my gts-t. Although I can't decide which of the three HKS turbos would be better. I want something that is bolt-on and doesnt require a lot of work. My target is between 300 and 350 hp. I have a fmic on the way, PFC, splitfires, new plugs, intake, exhaust, gtr injectors on the way (with resistor pack), and a new fuel pump when i can find one that is close. Any other suggestions for supporting upgrades? I have been told the 2530 and 2535 are direct bolt on, though I know the 35 has a t25 flange rather than a t3 like the 30 and 40. I have also been told I will need to get an 02 housing as well.
If anyone could post their experiences with each turbo it would also be greatly appreciated. thank you very much Adam