would i still lose some low end hp with the set up i have now (look in sig) + a trubendz exhaust without the resonators ?

FORSALE - 17" FSVT Wheels, TRubendz catback w/magnaflow muffler PM ME 02 celica GT-S 6-spd w/ TRD bodykit Greddy evoII exhaust, DC sports header Injen Short ram intake, TWM short throw shifter, 18"centerline storm wheels, Tein basic coilovers