Performance injectors in your 6.0L Ford Powerstroke can be the perfect upgrade for better towing, fuel economy, and more overall power. The Holders Diesel Stage 1 155cc Tow Power Injectors are the perfect upgrade for 6.0L Powerstrokes. These injectors displace 155cc of fuel and are available in a stock or 30% over nozzle. The smaller nozzles sizes will help with fuel atomization and controlling EGT's while towing. The larger sizes (80-100%) will be better for top end power. If your stock fuel system is in good working order, it will support these injectors. Holders recommends you check your fuel pressure to ensure it does not drop below 45psi under load. Each injector is remanufactured with all new parts including new spool valves, solenoid assembly with connectors, fuel plungers, and intensifier pistons. All injector bodies are precision honed and new parts fitted to each individual injector body making them one of the most reliable replacement injectors on the market.