You asked for it ! Introducing The Factory’s brand new 3′ tall Sub Box. Throw this baby on top of our 7′ quarter as a sub, or push it right up to the tranny to turn the quarter into a 10′ vert wall (the bottom of the sub has a continued transition for the 7′ quarter). You can even put this sub box on one of the two 5.5′ box launches that the Factory has. Heck, use it as a simple grind/manual box on flat ground, and even combine it with our Elevating Grind Box. Lots of options ! Come shred !!