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Speed Wizard
Correct
your speedometer after changing tire size
  
    
      Problem: 
      
      
      When 
      tire size or gear ratio is modified, the speedometer on the vehicle will 
      read incorrectly. When a vehicle's speedometer is in error, so is the 
      odometer reading. This situation may lead to missing scheduled maintenance 
      and even worse, traffic violations. 
         
      Solution
      
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The Speed Wizard solves this problem by conditioning
          the speedometer signal to the correct counts per MPH.   
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Adjustment of the speed wizard requires very little
          time to correct for a change.   
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Adjustment uses the vehicle speedometer as an
          indication tool.  
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All of this can be accomplished while parked.  
       
        
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      Highlights
      
        - Does not interfere with ABS control or other onboard electrical
          systems.
 
        - Verification of speed correction when parked, by viewing the old and new speed on the
          speedometer.
 
        - Settings may be saved numerous times.
 
        - Simple correction techniques, by using two push buttons.
 
        - No trim potentiometers (mechanical screws) to get dirty or wear out.
 
         
       
        
        
      Check out what others are saying! 
      VIEW
      TESTIMONIALS 
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PRICE is very Competitive!!! 
Less intuitive devices have sold for as much as $230 
Buy a Speed Wizard Now for just $209.98, free shipping to lower 48 States. 
Great Birthday or Fathers Day Gift! 
MADE IN THE USA! 
Speed Wizard is shipped free UPS ground to the lower 48 states. 
Alaska and Hawaii will have additional shipping costs. 
You can Order by calling us @ 201-828-9822 
  
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       People usually are interested to know how a product came to be.  I
      tried my best to explain it here, if there are specific questions just
      send us an email.  | 
   
  
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       People like to research the products before they buy them, you can download
      the manual here, it shows how the speed wizard is used and installed. Feel
      free to ask us any questions using the form below.  | 
   
  
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       99-04 Owners, here is a nice guide to use for your install.  | 
   
  
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       2005 - 2008 owners, here is the wiring diagram from Ford DVD's 
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       If you own and like the Speed Wizard, tell your friends. This is a single
      page document that explains the Speed Wizard and has necessary contact
      information. 
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       Ask us some questions about this product, we are ready and willing to
      answer any questions you may have.  | 
   
  
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       Here is a video showing just how easy it is to adjust the Merlin
      Controls Speed Wizard.  | 
   
  
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       Already own and use a Speed Wizard? To make our product even better
      please Send us some feedback on the Speed Wizard.  | 
   
  
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       This is the same feedback form as above except it is in WORD format.
      This is for users who would prefer to fill out the form in MS WORD then
      send it in.  | 
   
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