spl wall

allright i plan on walling 2 18's behind the front seats of a car on a 4k...i have heard that a driverside port tuned high will get me the most db's is this true? if not what configuration with 2 18's on 4k will get me the loudest? p.s. not looking at 4th or 6th order just ported

so i have 2 hx2 power 15's dual2 i was planing on running 4 of them in my blazer on about 4500rms or so. but the 2 i have need to be reconed itll cost me 170 apiece on the recones plus 25 shipping. so should i just go on and get the recones or steer into another direction i think that the 4 15''...