SET OF 4! Single purchase is a whole set of spark plugs. These are a heat range hotter than the factory plug. For years this was a community favorite plug on Starquestclub and all other forums. These are Highly recommended with basic power upgrades or increased boost on the factory engine. Heat range is 7
Mike Rennie (verified owner) –
Armando (verified owner) –
Always fast and reliable and user friendly website all the time. thumbs up 👍 and five stars