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FASS Fuel Systems Drop-In Series Diesel Fuel System 2017-2023 GM (DIFSL5P1001)
Heavy Duty Replacement
The 4 inch Monster exhaust system flows up to 122 percent better than stock and virtually eliminates backpressure
we updated to a bar-and-plate core construction
Mahle SS45974 Valve Stem Seal Kit CORE-0 FASS Fuel Systems Drop-In SeriesReplace the worn valve stem seals inside your 2001 2010 GM 6. 6L Duramax when you purchase the MAHLE SS45974 Valve Stem Seal Kit. Designed as a direct factory replacement, the MAHLE SS45974 Valve Stem Seal Kit is made to OE specifications and is constructed from OEM quality materials. Features: OE Quality Maintains a Factory Performance Application Notes: Position: Intake and exhaust. 16 seals, 2 kits needed per engine. 1 per bank.