Fuel Issue after mods

High Ranger

Registered
All right gentleman..... I have an 05 that I put a set of D&D show and go slip on's on and the milage was fine after that, now I just installed frame sliders and a K&N air filter and I went from 50mpg to something around ~25mpg. Exhaust smells really rich, but not much worse than it did off the showroom floor. Should I install a power commander or get the computer re mapped or something to go with all the free flowing intake and exhaust or is it something else?
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  Thanks Guy's.

Mike
 
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