The L5P is the current 6.6L Duramax (2017-present), a high-output redesign with a new fuel-injection system and turbocharger. We carry OEM-brand L5P parts - fuel injectors, high-pressure pumps, turbochargers, and related fuel-system and engine components - many with no core charge and fast US shipping. Because Duramax parts vary by generation, verify the part against your L5P by OEM cross-reference before ordering.