Sinister Diesel Valve Cover Gasket – 7.3L Powerstroke
Fits 1998–2003 Ford F-250, F-350 Super Duty, and Excursion with 7.3L Powerstroke
Key Features
• Premium single valve cover gasket – designed specifically for one side of the 1998–2003 7.3L Powerstroke
• Restores a tight, reliable seal between the valve cover and cylinder head to stop oil leaks and contamination
• Built from high-temp, oil-resistant materials to withstand extreme diesel heat, vibration, and pressure
• Direct-fit replacement – installs easily using factory hardware with no modifications required
• Meets or exceeds OEM sealing specifications for performance and longevity
• Backed by Sinister Diesel quality assurance and in-house technical expertise
Reasons to Upgrade
Oil leaks from the valve covers are one of the most common issues on higher-mileage 7.3L Powerstrokes. The original gaskets become brittle and lose their sealing ability over time, leading to oil seepage that can contaminate wiring harnesses, injectors, and other vital components.
The Sinister Diesel Valve Cover Gasket is the premium solution to this problem. Built from upgraded, heat-resistant materials that maintain flexibility and sealing strength far longer than stock replacements, it’s engineered to handle the harsh environment of the 7.3L’s valvetrain. Whether you’re replacing one side or doing both during top-end service, this gasket restores leak-free performance and long-term reliability.
Product Description
The Sinister Diesel Valve Cover Gasket is a high-quality direct replacement for one valve cover on your 1998–2003 7.3L Powerstroke engine. Designed to deliver OEM-level fitment and superior sealing, this gasket eliminates oil leaks and keeps contaminants out of your valvetrain and wiring harness connections.
Made from premium oil- and heat-resistant compounds, it’s built to handle years of high-load operation without hardening or losing compression. Perfect for preventative maintenance or repair, this gasket installs easily with factory hardware—no trimming or modifications needed.
Kit Includes
• (1) Sinister Diesel Valve Cover Gasket – fits one valve cover (driver or passenger side)
Why Buy From Sinister Diesel
Since 2009, Sinister Diesel has been the go-to name for Powerstroke reliability and performance. Every part we offer is tested in-house and in real-world diesel environments to ensure it meets our strict standards for quality, fitment, and durability. With fast shipping, knowledgeable U.S.-based support, and proven products trusted by enthusiasts nationwide, Sinister Diesel is the name you can count on to keep your 7.3L Powerstroke running strong for years to come.
