Sinister Diesel 1999.5-2003 7.3L Powerstroke, Coolant Reservoir (Degas) – SD-DEGAS-7.3


Product Highlights:

Replace that cracked, leaky and boring factory coolant reservoir with this stylish and high-strength all-aluminum coolant reservoir from Sinister Diesel. This 1999.5-2003 Powerstroke 7.3L coolant reservoir is made from 6061 aircraft-grade aluminum that is TIG welded and pressure tested for maximum strength. Best of all, the aluminum design helps to dissipate heat in the coolant system improving both performance and longevity.

The 1999.5-2003 Powerstroke 7.3L coolant reservoir is a drop-in replacement for the factory coolant reservoir, so no modifications are required for this installation. Installing the coolant reservoir is quick and easy, and it can be installed with basic hand tools in less than 30 minutes even for a beginner. All of the installation hardware is included, and the sight glass allows for easy coolant level inspection.

This 1999.5-2003 Powerstroke 7.3L coolant reservoir is manufactured at Sinister’s Sacramento, CA facility for maximum quality control. Great care is put into the part’s cutting, forming, fitment and welding to ensure years of trouble free performance. The coolant reservoir is finished in Sinister Blue for a clean look under the hood. All Sinister Diesel coolant reservoirs are covered by a !

Sinister Diesel Coolant Reservoir installs easily, even for a beginner, with basic hand tools in less than 30 minutes.

Key Features

  • TIG Welded 6061 Aluminum Construction – Substantially stronger than OEM
  • Pressure tested
  • Powder Coated in Sinister Blue
  • Drop In Replacement – Installs in less than 30 minutes
  • Sight glass for easy level inspection


  • Sinister Diesel Coolant Reservoir
  • Installation Hardware

*Special Order. Please allow for additional shipping time.

Patent Pending

Please Click Below for *Installation Instructions*