ACDelco R44TS8 Spark Plugs

ACDelco R44TS8 Spark Plug, GM Original Equipment, part 5613794, is a copper-core, conventional spark plug designed for General Motors engines from the mid-1980s. It uses a copper core to promote efficient heat transfer and reliable ignition, and its conventional construction makes it suitable as a direct OE replacement on compatible GM powertrains. The plug features a 5/8-inch hex for common socket tools and is sold individually, simplifying replacement when a single plug is needed. The R44TS family appears in GM-era applications, including the 1984–1987 Buick Regal, illustrating its role in GM’s older engine lineup. Cross-reference databases list R44TS8 as the same GM part number 5613794, confirming it as a direct GM OE replacement option for the same engine families. Availability across major retailers—NAPA, AutoZone, and CarParts—underlines its status as a standard spark plug used to restore OEM ignition characteristics on eligible GM engines.