I got an 85 s15 Blazer 4wd recently, And decided to build a box for these 4-8"s and see how they sound in the Blazer... They sound wonderful Going to put these in my civic once its running again, and Still waiting for the silicone to dry on my 12" so I could build a box for it for my blazer.
Each sub requires 0.5 cubic feet in a ported box tuned to 35hz. This box is 2.007 cubic feet and tuned to 35.013hz.. Id say as close to perfect as possible