This Bosch WR5DC+ spark plug is the direct-fit service plug for the Porsche applications listed in the fitment table below. Bosch has been a global leader in automotive technology since 1886, pioneering innovations like electronic fuel injection and oxygen (lambda) sensors that shaped modern engine management. Today, Bosch supplies OEM-quality sensors, engine electronics, ignition components, and braking parts found in vehicles worldwide. Known for precision engineering and reliable performance, Bosch parts are built to factory specifications for dependable fitment and long-term durability. Technical Details Manufacturer part number: 7992 Bosch trade number: WR5DC+ Thread size: M14 x 1.25 Reach: 19 mm (3/4") Hex size: 21 mm / 13/16" Gap: 0.8 mm / 0.031" Construction: Copper core with yttrium-enhanced center electrode Fitment & Compatibility Use the fitment table below to confirm coverage for 911T, later 911, 914-4, 914-6, 944, and 944 S2 applications. Spark plug requirements can change with engine updates, tune state, and ignition setup, so compare the plug number in your car if it has been modified. If you want us to check plug selection before you order, send us your engine type or VIN. We have been doing Porsche parts work for over 20 years, and ignition details still deserve a close look. Year Make Model Submodel Notes 1980 Porsche 911 1981 Porsche 911 1982 Porsche 911 1983 Porsche 911 1969 Porsche 911 T 1970 Porsche 911 T 1971 Porsche 911 T 1972 Porsche 914 1970 Porsche 914 6 1971 Porsche 914 6 1990 Porsche 944 1991 Porsche 944 1989 Porsche 944 S2
