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Rc8 r evo 4 exhaust

2K views 2 replies 2 participants last post by  xX_CHARTRAW_Xx 
#1 ·
I just recently bought the evo 4 exhaust with club kit. I had the special mapping put in. Now in 4th gear at 8ooo rpms the bike quiets making power like the air fuel is way off. anyone have an idea?
 
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