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Discussion Starter · #1 ·
Will the Max Energy Programmer re calibrate my speed odometer due to my bigger tires? I do not want POWER I want to improve MPG. I pull a 12,000 lb 5th wheel. I removed the cat and I am going to remove the muffler will this effect the results of the programmer? Do I need an EGT gauge to be safe? I am new at this programmer thing and I need something simple with results.
 
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