Lies the GTRS isnt exactly Hi power....it still creams all the others....If I decide the good turbo route i will go the GTRS...if I go the tight route I will go the GT30...and I bet that results are similar despite the size difference but with the GTRS easier to fit and with better response! The HKS is always worth it when comparing the real deal to direct equivelents and it has been proven time and time again, Wheel aerodynamics is everything