NGK is one of the world's leading spark plug original equipment manufacturers. NGK spark plug heat value and design correspond to the original.

Width across flats: 20.8mm
Thread diameter: 14.0mm
Thread length: 19.0mm
Electrode distance: 0.9mm
Resistance: not suppressed

OEM numbers for comparison purposes:

Bosch: W 7 D0 / W 7 DC / W 7 DP / W 6 D / W 6 D1 / W 6 DC / W 200 T27 / W 200 T30 / W 215 T30 / W 220 T30 / W 175 T30 / 0 241 235 563 / 0 241 235 602 / 0 241 235 755 / 0 241 240 530 / 0 241 240 539 / 0 241 240 611
Champion: N 8 Y / N 9 Y / N 9 YC / N 9 YCC / N 9 YCX / N 10 Y / N 66 Y / N 79 Y / N 89 GY / N 281 YC / OE 001 / OE 022 / UN 79 Y
Denso: W 20 EP-U / D 4 / 3043