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When you are trying to make big steam, as KJ would say, you don’t cut any corners. The Lethal Boss’ JT-Trim wasn’t going to draw air through the stock airbox. To feed the beast, Harvey installed the optional Vortech Competition Air Inlet Upgrade (PN 4FQ112-060; $290.95), which includes a new airbox and a larger conical filter. Vortech says it should be good for up to a pound of boost from the reduced restriction.