Chevy 6500 what? The variable vein option is nice, however you will have to fab up a control system to operate the veins so it spools at lower rpms then opens up as the rpms increase to keep boost consistant. Even with a variable vein turbo, if it was off a huge engine (which I'm guessing a 6500 chevy anything is going to be big) it may be too big for the our 2.4 liter engine to spool.
Jason
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