Sinister Diesel Glow Plug Relay – 7.3L Powerstroke
Fits 1994–2003 Ford F-250 / F-350 / F-450 / F-550 Super Duty and 2000–2003 Ford Excursion
Key Features
• Direct-fit replacement engineered to meet or exceed OEM specifications
• Precision-manufactured for perfect fitment and dependable performance
• Restores proper glow plug operation for quick, easy starts in cold weather
• Built from high-grade, heat-resistant materials for long-term reliability
• Designed to handle heavy-duty diesel electrical demands
• Backed by a 2-Year Warranty and Sinister Diesel’s quality assurance
Why Upgrade to the Sinister Diesel Glow Plug Relay
Cold starts can put serious strain on your 7.3L Powerstroke, and a weak or failing glow plug relay can make things even harder — leading to extended crank times, rough idle, and hard starts in cold weather. The Sinister Diesel Glow Plug Relay is a premium-quality replacement designed to restore fast, consistent glow plug performance and help your engine fire up easily, no matter the temperature.
We’ve tested multiple relay suppliers to find the most reliable and consistent design — and this one outperformed the rest. With low failure rates, strong electrical contact points, and consistent voltage delivery, this relay ensures your glow plugs get the precise current they need for dependable cold-weather starts.
Product Description
The Sinister Diesel Glow Plug Relay is built to handle the heavy-duty electrical loads of the 7.3L Powerstroke. Engineered for a direct OEM fit, it installs easily using factory connectors with no wiring modifications required. Constructed from durable, heat-resistant materials, it’s designed to withstand the harsh environment of the engine bay while maintaining consistent electrical performance.
This relay meets or exceeds all factory specifications, ensuring smooth operation and reliable starting even in the toughest climates.
Kit Includes
• (1) Sinister Diesel Glow Plug Relay for 1994–2003 Ford Powerstroke 7.3L
Why Buy From Sinister Diesel
Since 2009, Sinister Diesel has been the trusted name in Powerstroke reliability and performance. Every part we offer is tested in-house and proven to meet the demands of real-world diesel use. With fast shipping, expert technical support, and our commitment to quality, you can trust Sinister Diesel to keep your 7.3L running strong through every cold start and every mile.
