NGK B9HS short base spark plug (medium index)

NGK's B9HS spark plug is a very solid, original type short-base spark plug. Use it during your break-in and your adjustments, average thermal index, it has the right temperature in order to carry out the adjustments and break-in or to run your original engine all the time or even when pushed. It is not made for extreme performance. As this candle is not resistive, it does not require a resistive interference suppressor.

-Reserved for engines: origin a moderately powerful. Or very equipped during the break-in / adjustment period. To be accompanied by a standard non-resistive interference suppressor.

What does B9HS mean:

- B = Ø14mm base (to be tightened with 20.8mm key)
- 9 = average thermal index (between hot and cold)
- H = thread length 12.70mm (short base)
- S = Central copper electrode