RPM LS7 Cylinder Head PackagePackage includes listed components and full professional installation: Race Proven Motorsports Custom Spec'd CNC'd Ported LS7 Cylinder Heads w CHE Precision Bronze Valve Guides, Manley LS7 Solid Stainless Steel Exhaust Valves, Dual Valve Spring Kit, Hardened Pushrods, GM LS7 MLS Head Gaskets, GM LS7 Lifters, GM Cylinder Head Bolts, GM Exhaust Manifold Gaskets, NGK TR 55 Spark Plugs, and Mobil 1 Oil Change w NAPA Gold oil filter Custom ECU Calibration