the rack is built with 1/2" aluminum sqaure tubing. the rack weighs less than 1 pound. the amp weighs about 20. ill take it out when i go autocrossing. using stock mounting points, it wont be too hard. all together, with the subs, amp, amp rack, and fiberglass/mdf box, at the most it will be 100 lbs. my last system weighed 85 bounds, and that was for the same amp, 2 12" subs, and a full mdf box. the box and subs weighed around 50 lbs im sure..... a PITA so get out for autocrossing.... but a hatch will make it easier. if i need to race that badly on the street, ill kick the passenger out....