103606CP / 103606CP - Application Notes The Power Cowl is necessary for hood clearance for the Stillen G35 supercharger. This unit is a gloss finish carbon fiber cowl. More highly prepped and consistent a finish than the matte finish unit. No final prep and painting required. A template for cutting an opening in the stock hood is provided as are installation hardware and instructions. Ships by UPS or FedEx. Shown in the image is a painted fiberglass cowl. The Carbon fiber Cowl is the same exact design.