My power was down on the RR day and Andy k said my up pipe was cracked as he could tell where the gases had been escaping....... Just piecing the things together why I felt the car had been sluggish before hand.......so a fucked up pipe, bigger head gaskets and no map after, shit air feed to the top mount........could this lose me 80hp???........but about the blowing it's only noticeable at low revs and pulling away......defo not exhaust it's brand new????