Wehrli High Pressure Rail Fitting for LLY, LBZ, LMM Duramax and 6.7L Cummins

- Long Ported High Flow Fuel Rail Fitting for use on driver side rear rail port on LB7, LLY, or LML Duramax - For installing a HP line into PRV port (such as a dual CP3 application) - Also compatible with 6.7L Cummins - Drastically improves fuel flow over OEM fittings for more consistent rail pressure in high performance applications Long Stainless Steel Rail Fitting for LLY, LBZ, & LMM Driver side rail rear port. Also compatible with 6.7L Cummins applications. Ported 1/8" ID for increased fuel flow to eliminate restriction in the stock fitting which can cause rail pressure drops in high performance applications.