United Motor Products DC840X Delco EST V8 Marine Distributor Cap Blue

The United Motor Products DC840X is a replacement Delco EST ignition distributor cap engineered for V8 marine and automotive engines. Featuring a distinctive blue glass-filled housing and brass terminals, this cap provides reliable spark distribution and long-lasting corrosion resistance—critical in demanding marine environments where aluminum terminals quickly degrade.

Supplied with attaching screws, the DC840X is a direct-fit replacement for the OEM Delco EST (Electronic Spark Timing) cap used on small block and big block GM V8 engines. It is a trusted choice across a wide range of inboard and sterndrive applications.

Key Features:

• Brass terminals for superior conductivity and corrosion resistance
• Blue housing — glass-filled polyester construction for durability
• Designed for Delco EST (Electronic Spark Timing) ignition systems
• Screw-down retention design for a secure, vibration-resistant fit
• Includes attaching screws
• 60-month warranty backed by the Magnuson-Moss Warranty Act

Compatible with MerCruiser, Volvo Penta, Crusader, OMC Cobra, Indmar, PCM, and other GM V8 EST ignition applications. A reliable OEM-quality replacement for both marine and automotive use.