Fleece High Pressure Injection Line (#4 & #5) For 04-05 LLY 6.6L Duramax Diesel transmission Tune your 2017-2019 GM 6

Tune your 2017-2019 GM 6

Modified valve body versions available for many popular calibrations

2015 - 2020

Paired with premium FOX shocks

Please note your color choice during checkout

Fleece High Pressure Injection Line (#4 & #5) For 04-05 LLY 6.6L Duramax Diesel transmission Tune your 2017-2019 GM 6The LLY Duramax High Pressure Injection Line 1 and 8, from Fleece Performance Engineering, is a high quality solution designed to optimize the fuel delivery system in your LLY Duramax engine. Specifically engineered to fit LLY model Duramax engines, these injection lines ensure a precise and reliable fitment. Crafted with precision and durability in mind, these high pressure lines are built to withstand the rigors of high fuel pressures and deliver