Cadillac Series 61 Parts & Accessories

Shop the listed NGK V-Power XR4 spark-plug package for a Cadillac Series 61 ignition-service project at Black Ops Auto Works. The current product application includes 1950–1951 Series 61 entries. Match NGK 5858 to the installed engine before ordering the required four-plug packages.

XR4 Spark Plugs and Package Quantity

The listing supplies four NGK XR4 plugs. Count the plugs required by the actual engine and compare that total with the package size before placing the order. For an eight-plug service using this exact reference, two four-plug packages provide eight plugs.

Choose the plug reference before calculating quantity. Thread, reach, seat, heat range and specified gap must suit the engine, including any conversion. The package supplies spark plugs; wires and other ignition-service components are separate purchases unless expressly combined.

Choose Your Part

• Identify the installed engine and required NGK specification.
• Confirm XR4 / NGK 5858 application and installation requirements.
• Match the total plug count to four-plug packages.

Frequently Asked Questions

How many plugs are in the listed XR4 package?

The current listing supplies four spark plugs. Two packages provide eight plugs when an eight-plug service requires this exact reference.

Does the package include ignition wires?

No wires are identified in the spark-plug package. Select any separately required ignition components for their own engine application.

Can XR4 be chosen only from the Series 61 badge?

Confirm the installed engine and complete NGK application first. A converted engine may require a different thread, reach, seat or heat range from the original configuration.

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