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Part #: WR5DC+
BOSCH Yttrium Core Super Plus Spark Plug. 3/4 (0.75) inch reach. REPLACED the W5DC.
Vehicle Manufacturer: BMW
Application: AIRHEADS; R45, R65, R50/5, R100 (1977-84) not 100/7/ T 77-78
Make/Model: BMW : R45, R65, R50/5, R100 (1977-84)
Model Years: 1977 to 1984
Vehicle Mfg. Part #: ... 146
Power Rating: Heat Range 5 (1=Cold / 9=Hot)
Original Equipment: 
Technical Information: Thread reach 3/4 (0.75) inch (.708 inch with tapered seat). 14mm thread diameter. Extended tip electrode. REPLACED the W5DC; Features Ytrium Center electrode ; Benefits: Longer performance life,
V groove ground electrode for increased flame kernel propagation.
Please read the Bosch Super Plus Spark Plugs Technical Flyer for more information.
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