I sold my 99 GT last week. I'm selling the sub-box only. Subs are already sold. If you don't have the Mach 460 it will tuck under the rear deck with no problems. I removed the Mach system but kept the platic speaker enclosure it still fit but it was a tight squeeze. $65 shipped ( due to the size and weight). Located in Greensboro, NC. (If picked up locally $30). PM if interested. If it helps anyone, here is a picture and dimensions: Width 32" x Height 11-3/4" x Top Depth 4-3/4" x Bottom Depth 19-1/2"