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I agree with Voodoo, and Have more info. if you got your car tunned in winter and its lets say 30 Deg. and you keep the tune through the summer and its 100 deg. then your tune isn't going to be good anymore.. So its a good idea to have a wideband to make sure you are running safe at all times.. But no you don't need one..
If you decide to get one let me know I will give you a good deal.
PMP
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