But if you want to include a lot more and access four hundred HP, you must exchange your OEM turbochargers While using the GTR RB26DETT N1 turbochargers, get a huge intercooler and an MLS gasket head.Even though it has a bigger displacement when compared to the RB26DETT, optimum doable horsepower is fewer, given that the RB30 block lacks the RB26 b