All engines are sold as used long blocks (block & heads). These engines are sold with the understanding that wiring, sensors, fuel systems, manifolds, etc. may need to be changed to fit your application (these items may or may not be on the engine). Our warranty covers the block and heads only. All seals, gaskets, and filters must be replaced before install. Some items may be left on the engine for customer’s convenience; however, they are not covered under warranty. Examples of non-covered parts would be: intake manifolds, exhaust manifolds, throttle bodies, fuel rails, fuel injectors, EGR valves, other emissions parts, wiring, crank sensors, cam sensors, other electrical sensors, valve covers, distributors, carburetors, flywheels, etc.