These injectors come with a new copper crush washer and o-rings for installation. Injectors are an OEM Genuine part that is a direct replacement injector.
When replacing the injectors in your 5.9L Common Rail we highly recommend replacing the injector connecting tubes to avoid new injector contamination. The most common failure of new injector installations is contamination and the problem that we see most on these comes from the injector connecting tubes.
Each injector has a $150 core charge and is fully refundable if they are shipped back within 30 days.
All Industrial Injection / OEM products are covered by a one year/unlimited mile warranty.