Want to maximize the power of your VMP supercharged 2003-2004 Cobra? VMP offers a full line of pulleys for the Cobra owner to increase boost levels and get more horsepower from your VMP supercharged setup. Ultra-light and durable, the VMP 2.9" supercharger pulley is constructed from high quality billet aluminum that's anodized in a great black finish. The VMP 2.9" pulley will give you an average boost level of 17-18 psi with a stock lower. When changing to a smaller pulley from stock, to maximize belt wrap and minimize belt slippage, an Auxiliary Idler Kit is recommended to reduce belt slack. Any quoted boost numbers are based on VMP tuning. Includes: (1) 2.9" Bolt-on pulley