One of the easiest ways to Pump up the Power to increase the Factory Boost Level. SLP's 2.70 Blower Pulley provides approximately 3 Additional Psi of Boost, resulting in gains of up to 35 Rear-wheel Horsepower, but not at the cost of Reliability or Durability. It's made from Powder-coated Ductile Iron for Maximum Durability and features Extra-deep Grooved Ribs to Eliminate Belt Slippage. Retains use of the Factory Serpentine Belt.