it seems that the problem was partially in part of my exhaust hitting against something, i put back on two of my long exhaust hangars on the midpipe, and the one near the axle on the axle back section (greddy evo2 exhaust), and the sound has been happening much less on the redwood road & palomares road (where i tested it every time). the sound still happens when i do gas and brake uphill. i'll try again going uphill over dublin canyon again..but i still hear the noise, but it's very slight