which way do i face the subs?

im not a firm believer in the idea that that it does not matter which way your subs are facing. some say that since the frequencies are so low as to supposedly radiate everywhere. if this were true then there wouldnt be the gas tank problem.

im debating cutting holes in the rear deck - will probably just overcome with sheer wattage.

so which way do i point my subs? face upwards or rearwards-away from the evil sound absorbing black hole of a gas tank?

if anyone has pictures of their subwoofer installation please post em.