I wud assume to spool the turbo but on the line thats really not necessary cause u can build quite a bit of boost anyway. or maybe its to pressurize the WG or shift ram. I know ppl on the street that use it to build boost but with todays modern turbos that spool up pretty quick thats not somthn I see very often these days.
Since there are no pictures of the right side - if it wasn't for the air intake I might have thought it was electric Especially because there is no gas cap.
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