Well first off i have an 07 civic si sedan. Now i have a fujita sri and tsudo exhaust. But for a while i have noticed that if im in 4th or 5th or 6th gear and begin to press the pedal heavily my rpms jump up but i experience little acceleration. I want to say my air fuel ratio is off but i tried to reset the sensors by disconnecting the terminals for 15 min. Any help would be great not sure where to go from here. Dont know if i should take to dealer of what!