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  1. M

    what would this car be worth

    i have a 03 mach 1, mods are, slp long tube headers, slp x-pipe, and slp mufflers, 5.0 shifter, cold air intake, diablo hand held tuner, custom subframe connectors, aluminum driveshaft, driveshaft saftey loop, welded axle tubes, 4.30 gears, detroit locker(full locker), moser 31 spline axles, PA...
  2. M

    advice on headers

    i have an 03 mach 1 and i bought the SLP long tube headers for it. ive already heard its a pain. im new to the mustang world ive been a camaro guy for awhile but i wanted to know i read somewhere that i should install a 160 thermostat with these headers to help lower combustion temps to keep...