The FASS Fuel Systems Billet Filter Cap replaces the original plastic fuel filter cap on 2017-2024 L5P Duramax engines, addressing potential issues with rounding and cracking.
The OEM plastic fuel filter cap on L5P Duramax engines is known to be vulnerable. It can round off during water separator replacements and crack in very cold conditions. This billet fuel filter cap serves as an upgrade for both the factory plastic fuel filter housing and FASS Drop-In Series systems. Manufactured in the USA from 6061 billet aluminum, it maintains the 36mm socket size for removal. Additionally, it features a billet aluminum drain valve for tool-free draining.
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