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Like the previous Three-Valve kit, the Vortech 5.0 blower is the V-3 self-lubricated Si-Trim. This kit contains its own oil, and does not plumb into the engine's oil system. Helical drive gears keep noise low and the Si-Trim builds boost over a wide, for a centrifugal, rpm range. The drive pulley is 3.8-inch which just touches 8 pounds of boost at 6,800 rpm where the Coyote's soft rev limiter begins limiting power.