This is a high - quality injector return line bolt kit designed for 2001 - 2004 GM vehicles with the LBZ 6.6 Duramax engine. Industrial Injection, a leading distributor, supplier, and remanufacturer of diesel fuel systems, turbochargers, and engines, brings you this product. Their unmatched experience in fuel injection, turbochargers, and engine components ensures you get the best for your light, medium, and heavy - duty diesel. The part number is 412604. It comes as a set of 8 well - made bolts.

Using this injector return line bolt kit is straightforward. First, make sure your vehicle's engine is turned off and has cooled down. Then, find the injector return line on your 2001 - 2004 GM vehicle with the LBZ 6.6 Duramax engine. Remove the old bolts carefully and replace them with the 8 bolts from this kit. Tighten the bolts properly but don't over - tighten as it may damage the parts. As for maintenance, regularly check the bolts for any signs of looseness or wear. If you notice any issues, replace the bolts right away. Also, keep the area around the bolts clean to prevent dirt and debris from causing problems.