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copy and pasted from his mind, lol hes the deezel god

or could be cuz ur sucking in more cold air now, which might trip a air temp sensor and make ebpv work harder, not to sure

the hissing sound? its just ur turbo, u'll notice more turbo noise when driving too from an intake upgrade...it will only do it when its "cold"...i believe its just releasing the pressure, chris will...