I bought a 97 Cobra that had 40 series on it with a BBK x-pipe. The inside of them were rusted out all the way. I put 40 series Flows back on it and am very disappointed, they are loud and tend to rattle new. It may be the pos BBK x-pipe or it may be that it is a 4-valve motor. The Flows sounded good on the pushrod motors (95 and down) that I can remember. Also my tuner said that they don’t improve, I don’t know if I believe that but my choice would be Borla, or Magnaflow. I am going with Kooks LT headers, w/ Kooks offroad-X, no cats, and Magnaflow mufflers. The Flowmaster may be good on the 05 and up, put them on and if you don’t like them its nothing a couple hundred can’t handle.
1996 GT (sold)
1993 Ranger GT (not broke)
Want an 03/04 Cobra
Born:5/23/97, Build # 5722 of 6961 Builds