help please

i have a 07 precedent with jakes 6 in. lift. I hade to go up another 2 inches in the rear because I added a 12 in sub abovr the rear and it was touching the motor. Now I need to raise the front. just looking to see if anyone elase has lifted there front with a 6 in. lift or at least lifted at all and how much can I go and how to.....thanks


Cartaholic - V.I.P.