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Exhaust Slip on Question??

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Considering installing a Big Gun ECO Slip On Exhaust on my 2011 CRF450R. How much will this change the EFI settings? Will I need to get a EFI controller to make changes to the fuel map?? Thanks for any replies!!:lol:

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its always a good idea to remap with an aftermarket pipe and yes, youll need the EFI control unit.

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You do not "need" to remap though to realize the most gains from any mod you should. Send your ecu away for a remap, no need to get all the software. You also may want to consider a different pipe than a big gun. Mrd, Yosh, etc...

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