How much horsepower does a stock RB26DETT make?

Factory rating is 280 PS (276 HP) due to the Japanese gentleman's agreement. Independent dyno testing shows actual output of approximately 315-330 PS at the crank. The N1 race-spec version rated at 400 PS in motorsport trim. Modified tuning with upgraded turbos, fuel, and ECU can safely reach 500-600 HP on stock internals.