We provide a 30 day warranty from time of delivery on mechanical parts only. These engine and transmission kits are shipped out in good working condition. Everything that is stated in the description will be included in the kit. Not all parts such as the radiator, intercoolers, and fans will be factory OEM equipment. We understand that these packages are for custom projects and OEM cooling equipment is not always useful. We will not include extra parts or missing parts after the 30 day warranty. We do not cover any additional tuning expenses or labor.