i have a 2000 jetta 2.0 and i wanted to know if there is anything that i could do to it to make it have a deeper sound without getting an intake or exhaust or anything just yet. one of my friends has an 86 gti and he drilled holes in his airbox and another friend of mine has an 80 something bmw and he just took something out of his airbox. is there anything that i can do for mine? if there is, directions would be appreciated. thanks.