Redesigned from the original Hellriser, the TRES version it’s tailored to be competitive at all current sound competitions, with 9.25” at the back, a killer 10” mounting depth and 2.5 cu per bag these are well set to KILL the competition! another perk is that the OG Hellriser fender and rails will fit these bad boys so, if you have the Hellriser already and want to upgrade all you need is the bags!!!