This system was bought new at Corvettes of Houston on 4-14-05. It has less than 1000 miles on it. This four tip unit has the new double wall "pro tips" like the Corsa's. This system will provide a deeper mellow sound on stock cars and a slighty louder deep sound on mod'ed cars. New cost was: $774.00 plus tax " have receipt". Local sales will have priority. Price lowered to $625.00 plus shipping.