Speed circuit makes intakes that have the BOV VTA, and it shouldnt make a difference either way. A lot of people have it VTA just because its their preference. Whether its VTA or recirculated it still goes rich when you shift,
synapse synchronic on mine, recirculated. recirculated seems to be more daily driver friendly, and even though there are guys who run VTA with no problem, there are a lot that do tend to piss the car off
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