GM Silverado & Sierra Stage 1 $4,795‡ This package includes: S&B Filters Cotton Filter Cold Air Intake Kits Kooks 1-3/4″ Stainless Headers Kooks 3” Stainless Catted Y-Pipe Elite Engineering .

GM Silverado & Sierra Stage 2 $7,795.00‡ This package includes: Billet Core Camshaft (Stage 1-4) Dual Valve Spring Kit w/ Titanium Retainers Hardened Chromoly Pushrods Bronze Bushing Trunnion Rocker .

GM Silverado & Sierra Stage 3 $9,595.00‡ This package includes: Holley Hi-Ram Intake Manifold Katech 103mm Throttle Body Billet Core Camshaft (Stage 1-4) Dual Valve Spring Kit w/ Titanium .

GM Silverado & Sierra Stage 4 $15,995.00‡ This package includes: Magnuson TVS1900 Radix Sierra/Silverado 5.3L Supercharger System Katech 103mm Throttle Body Billet Core Camshaft (Stage 1-4) Dual Valve Spring .