Beats me, I guess I assumed it was aftermarket because of all the other typical ricer stuff the car had on it. Also, I've never heard a factory one whine that much, yet again, I've only heard the factory ones once or twice.
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1989 Black Mustang GT Hatchback, Underdrive Pulles, Electric Fan, Cold Air Intake, Headers, Offroad H-Pipe, Magnaflow catback, Steeda Tri-Ax, Fluidyne Aluminum Radiator, Timing at 14*, 3.73's
Coming not so soon: 408w
Ricer Hater's Club Member #59
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