OESpec Plus reman Injectors are the pinnacle of what you should expect outof new set of injectors. Each set of injectors are brought in direct fromthe OE supplier and then engineered at our facility using extrude honeprocesses to perfectly balance and match the set. This extensive calibrationprocess is performed to guarantee our customers the smoothest and most reliableinjectors the diesel industry has ever seen.FEATURES: - Smooth clean idle - Improved mileage - Slight HP gain - Direct replacement - 1 year Unlimited Mileage Warranty They come with new copper crush washers and o-rings forinstallation. Injectors are an genuine OE Spec Plus part that are adirect replacement set of injectors. When replacing the injectors in your Cummins 5.9L Common Rail wehighly recommend replacing the injector connecting tubes to avoid new injectorcontamination. The most common failure we see with new injector installation iscontamination. This problem is most commonly related to injectorconnecting tubes.Each injector has a $150 core charge and is fully refundable ifthey are shipped back within 45 days.All products are covered by a one year/unlimited mile warranty.