The two the GT500 and Raptor R share performance motor platforms. Mustang Spare Depot often lists 5.2L and 5.8L engines from both types. https://used-mustang-parts-for-sa30751.blogolize.com/fâ-a-hundred-and-fifty-raptor-r-gt500-shared-engines-you-should-buy-made-use-of-77597694