For customers seeking the performance of larger turbochargers capable of producing over 600AWHP, the AAM Competition 3.00" R LineIntake is an ideal upgrade option. By increasing the diameter of the intake tubing that houses the factory Mass Air Flow Meter, the MAF readings are significantly re-scaled. This re-scaling, along with a complementary tune via ECU reprogramming, allows the GT-R to meter over 800awhp. Because these intakes have a significant impact on the amount of air flow that can be metered, it is mandatory to have the GT-R tuned (COBB AP) for the engine to function properly with the AAM Competition 3.00" R Line