thanx guys for the info, my stang has 125 k miles on it already, it is tired and time for an overhaul, i have noticed it is using oil, and i do know that the older 4.6 was good on breaking down valve seals, i work at an svt dealership, so i have a hook up on parts. pretty soon here, i will be not only swapping the heads, but also adding headers (shorties) but am confused on the "X" pipe. i like the raspy sound that bassani makes, but i hear that the Dr. Gas makes more power and does not pop.. any news??
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