im thinking about doing a cheap, low budget, add on build in my tow truck. i want more or less practice at making door pods, and to have a better sound in my wrecker with out breakin the bank,. 4 of these ... 2 on each door on the head unit http://www.parts-express.com/pe/showdetl.cfm?Partnumber=299-012 or same deal on these http://www.parts-express.com/pe/showdetl.cfm?Partnumber=299-289 this is my wrecker, http://rendelsgmc.com/store/index2.php?page=shop.product_details&product_id=71&flypage=flypage.tpl&pop=0&option=com_virtuemart&Itemid=27&vmcchk=1&Itemid=27&pop=1&tmpl=component currenty i have a kickerf 8 in a bazooka tube on crossfire 100.2 and the factory 4inches above the head