i have the f22a6 intake. Its has a butterfly valve in it. Would it be better to take it out or leave it in. it says the purpose is so to give it more hp at higher rpms when open but more torque at lower rpms. so what should i do leave it in or take it out.
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Those butterflys are closed at lower RPMs to give the engien better torque. they open after ~4500rpm IIRC and let the engine breathe better at higher RPMs
http://www.pgmfi.org/twiki/bin/view/Library/IAB
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