Stillen ??s Stage 1 kit produces approximately 50 horsepower to the wheels and upwards of that at the flywheel. This power is delivered in a smooth, linear fashion from idle through redline. We are rating this unit at an average of 349 hp @6000 rpm and 322 ft/lbs at 4200 rpm. The average install time for a stage 1 blower is approximately 10 hours for a certified mechanic with experience in this type of installation.Stillen has worked hard to produce a kit that is state of the art in every way. They have invested in new testing equipment, personnel and tooling. They have produced a kit that is OE level quality or better.The unit requires additional clearance under the hood for the supercharger.They have 5 options to accomplish this. They are as follows: ? Replacement fiberglass hood. (This is supplied ready for final prep and painting.) Requires truck LTL shipping. ? Replacement carbon fiber hood. (Requires no painting.) Requires truck LTL shipping. ? Fiberglass Cowl. Requires a cut out of the stock hood. Supplied ready for prep and painting. Ships by UPS or FedEx. ? Matte finish carbon fiber cowl. Not as highly prepped or as consistently finished as the Gloss finish unit. Ships by UPS or FedEx. ? Gloss finish carbon fiber cowl. Adds high gloss finish and cosmetic prep to the Matte finish unit. Ships by UPS or FedEx. Please contact us for further details.