Description: This high - quality injection line set from Fleece Performance is a direct replacement for your 2004 - 2005 GMC/Chevrolet HD with a 6.6L Duramax engine. Upgrade those cracked, broken or leaking injector lines with our high - pressure fuel lines. Part Number: FPE - FL - LLY - 45. It replaces GM Part# 97378827.

How to use: First, make sure your vehicle's engine is off and cooled down. Locate the old injector lines and carefully remove them. Then, install the new Fleece Performance injection lines in their place, ensuring a tight fit. Notes: Always wear protective gloves and eyewear during installation. Avoid over - tightening the lines to prevent damage. Maintenance advice: Regularly check the lines for any signs of leaks or damage. If you notice any issues, replace the lines promptly. Also, keep the engine clean to extend the life of the injection lines.