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Gen7 190 - To Butterfly Value Remove Or Not.....

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Hi guys

Soo, I have had my butterfly value out of my air box now for a few months, while I love the extra growl the engine makes... I have read in a couple of places that the removal of this butterfly value could actually be decreasing engine performance... can anyone confirm this theory? As I have had a couple of situations where the engine did seem a bit bogged down, especially when taking off in cold conditions.. i.e cold engine start and cold temps outside etc. But most of the time it feels ok.. Would love to get confirmation thou.

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