Oil Caps

Sinister Diesel - SD-MCC-L5P

Sinister Diesel - SD-MCC-FORD-99Brake Master Cylinder Cap for 1999-2016 Ford Powerstroke.Brakes are easy to overlook in diesel performance until yours aren't working properly. OEM plastic factory brake master cylinder caps are prone to growing brittle...

Sinister Diesel - SD-OFC-FORD-03Oil Filter Cap for 2003-2010 Ford Powerstroke 6.0L/6.4L.A cracked fuel filter cap can lead to air in the fuel system. That can result in hard starting or potential fuel injector issues. A cracked fuel filter cap can also...

Sinister Diesel - SD-DC-6.7P-20

Sinister Diesel - SD-FC-FUEL-U-GRN

Sinister Diesel - SD-FFC08-01-20-GRNFuel Cap for 2008-2020 Ford Powerstroke (Green).The Sinister Diesel Billet Fuel Plug/Cap for the 2008-2020 Powerstroke is a stylish and durable option to keep dirt and moisture from entering your fuel tank. The factory...

Sinister Diesel - SD-DC-DMAX-01Coolant Reservoir (Degas) Cap for 2001-2016 GM Duramax 6.6L.This new Coolant Reservoir (Degas) Cap functions like a factory cap, but features custom Sinister Diesel looks. The cap fits OEM or Sinister Diesel Coolant...

Sinister Diesel - SD-DC-FORD-94Coolant Reservoir (Degas) Cap for 1994-2016 Powerstroke 7.3L/6.0L/6.4L/6.7L.This new Coolant Reservoir Cap functions like a factory cap, but features custom Sinister Diesel looks. The cap fits OEM or Sinister Diesel Coolant...

Sinister Diesel - SD-DC-6.7P-17Coolant Reservoir (Degas) Cap for 2017-2019 Ford Powerstroke 6.7L.This new Coolant Reservoir (Degas) Cap functions like a factory cap, but features custom Sinister Diesel looks. The cap fits Sinister Coolant Reservoirs for...

Sinister Diesel - SD-FFC-6.4Fuel Filter Cap for Ford Powerstroke 2008-2010 6.4L.A cracked fuel filter cap can lead to air in the fuel system. That can result in hard starting or potential fuel injector issues. A cracked fuel filter cap can also cause a...

Sinister Diesel - SD-FFC-6.0Fuel Filter Cap for 2003-2007 Ford Powerstroke 6.0L.A cracked fuel filter cap can lead to air in the fuel system. That can result in hard starting or potential fuel injector issues. A cracked fuel filter cap can also cause a...

Sinister Diesel - SD-FP-6.7C-GRNBillet Fuel Plug / Cap for 2013+ Dodge / Ram 6.7 Cummins (Green).The Sinister Diesel Billet Fuel Plug/Cap for the 2013+ Cummins is a stylish and durable option to keep dirt and moisture from entering your fuel tank. The...