One of the first companies of it's kind in the market, Black Cloud Diesel Performance (tm) has been doing business under it's original & only owner, Gary Nilsen, since it's inception back in 2004! Black Cloud Diesel Performance is located in Amherst Junction, Wisconsin. Black Cloud Diesel is a small company in a small town in Central Wisconsin. You will get personal service and technical application and sales assistance from each of us-customers are our priority, not just a number! Click here to see what our customers are saying about us! If you want to speak to one of us about a part you need, or have any questions about ordering, please call us at 800-872-1944. Unlimited Diesel Performance: Re manufactured Enhanced Stock , Stage 1 Performance , Stage 2 Performance , Conversion Single Shot , Performance Injectors with 30% nozzles, 80% nozzles, 100% nozzles (chip required)! Warranty inspection is required, therefore you must return the suspected part before warranty work can begin. If warranty applies, your core will be fully repaired tested and returned. We do not have an "exchange in advance program" as part of our warranty policy. We do not send free injectors in advance. Returns- only non-installed 7.3 injectors will be accepted and a 25% restocking fee + shipping will be applied.