Spark plug (disambiguation)

Spark plug may refer to:

• Spark plug, an electrical device in some internal combustion engines and ignites fuel by means of an electric spark
• Spark plug, a rod of uranium or plutonium in a hydrogen bomb used to heat the fusion fuel to the point of nuclear fusion
• Spark Plug, Barney Google's race horse from the Barney Google and Snuffy Smith comic strip
• Spark Plug (album), a 1971 album by jazz soul guitarist Melvin Sparks
• "Spark Plug", a song by Stereolab from their 1996 album Emperor Tomato Ketchup
• "Spark Plug", a song by Idiot Pilot from their 2005 album Strange We Should Meet Here

Sparkplug may also refer to:

• Sparkplug Witwicky, a Transformers G1 human character
• Sparkplug (Transformers), the Mini-Con partner of Optimus Prime
• Bob "Spark Plug" Holly, an American professional wrestler
• Sparkplug, the car in the animation series The Houndcats
• Sparkplug, a fast freight train operated by the Southern Railway
• Sparkplug lighthouse, a type of lighthouse named for its shape.
• Sparkplug Comics, a defunct publisher of alternative comics founded by Dylan Williams.