We are buying a '92 LX 5.0, and the owner was fairly young. The last owner told him it was a rebuilt 306 with .030 bore over, and an e303 cam. I watched videos with the e303 cam in it and the car sounds like a beast, but they also have headers, xpipe, and sometimes other mods as well as the cam. So we started the car up and it just doesn't sound like it has an e303, or any aftermarket cam in it.. Do you need to have aftermarket headers, and possibly an xpipe to hear the sound that a cam provides? View: http://www.youtube.com/watch?v=EPzkbxUfvPY Is what I think of, and it just doesn't sound like it's about to stall like cammed stangs do. whether it is rebuilt or not, we're getting the car for a GREAT deal considering the kid has no money to fix the car. engine runs strong, only need a new pair of tires and rims, and a back brake. tl;dr Do you need headers, and possibly an Xpipe as well as an e303 cam to get the sound that a cammed stang has?