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Discussion Starter #1
hi , do I need a dynojet power commandor if I just get a header pipe !? & do I need one I I get a full exhaust system ? & if yes Why ? FOR MY 2008 KFX 450r
 

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I would suggest it yes. If you are trying different exhaust for more power yes. You will also gain power from less restrictive intake boot. Not sure what headpipe you can run with stock muffler? The kfx does not have a secondary map & don't believe the stock ecu will deliver correct fuel for those mods.
 

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Discussion Starter #3
okay , so if I get a full exhaust system or just a slip on I should a dynojet power comm... and I need one because the stock (amount) fuel being put in is not enought !? I just don't understand the mapping part...
 
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