In the August issue of MM&FF it said that the Herts Mustang has the Ford Racing Performance pwer pack(FR1) and Handling Pack (FR3). From what the article said it was to add 25hp and 10lb-ft of torque. I guess it doesn't live up to that at all.
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03 Cobra, 01 Hayabusa, 06 Scion xB 3.0 #347.