TORCH F6RTC 131-039 Spark Plug Replace for NGK BPR6ES for Bosch WR6DC WR7DC | eBay
Amazon.com: Bosch Spark Plug Set WR7DC + - 129.52.86 - Set 2 Pieces - : Automotive
F7rtc Spark Plug (W20epr Rn9yc Wr7DC) Bosch AC Eyque - China Motorcycle Parts, Ngk Denso Champion AC Autolite Bosch | Made-in-China.com
Spark Plug | WR7DCPLUS | 7900 | Bosch
999 170 156 90B - Spark Plug WR7DC+ 85 to 91 32v| 928sRus, Inc.
Spark plug Bosch WR7DC for 520/4+520i all years of manufacturing, you need 4 for 1 car and for 525+528 up to 08/1976, you need 6 for 1 car | Wallothesch