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  1. Watch Billy Johnson Tear it Up in the Lethal Performance Focus RS

    News
    Check it out as Ford Performance man Billy Johnson tears up the Lethal Performance parking lot in their new Focus RS. Aren't 360 degree videos awesome!
  2. Got the 5.0 Dyno'd = 423HP/390TQ

    2011 - 2014 Mustang GT Tech
    Hey guys, Just put the 5.0 on the Dyno and it pulled a constant 422,423 all three pulls. I only have 600 miles on the car so maybe it will increase a little after a few thousand miles on it. I was a little skeptical at first when I bought the SCT tuner from Lethal Performance with a custom...
  3. American Thunder Axle Back and Lethal Performance o/r x-pipe

    2011 - 2014 Mustang GT Tech
    Hey guys, Just got done installing the American Thunder flowmaster axle back kit and Lethal Performance's O/R xpipe. The xpipe makes it sound 10x better and louder. I apologize for the quality of the sound since this is from my phone. Video clip of just the American Thunder kit and stock...
  4. American Thunder Axle Back and Lethal Performance o/r x-pipe

    2011-2014 Mustang Talk
    Hey guys, Just got done installing the American Thunder flowmaster axle back kit and Lethal Performance's O/R xpipe. The xpipe makes it sound 10x better and louder. I apologize for the quality of the sound since this is from my phone. Video clip of just the American Thunder kit and stock...
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