Porsche 356,911 NGK B6HS Spark Plug - 14mm Thread (Short Reach)

The NGK B6HS short-reach spark plug is a high-quality copper-core plug designed for Porsche 356, Porsche 912, and classic air-cooled Volkswagen engines. It provides reliable ignition performance and excellent heat dissipation in standard and mildly tuned engines using short-reach cylinder heads.

Now available alongside the NGK BP6HS, the B6HS features a 2.5 mm shorter electrode, which makes it ideal for engines with minimal piston-to-plug clearance. This is particularly important in Porsche 356 and 912 engines, where the piston can occasionally make contact with the electrode, causing misfires or damage. With the NGK B6HS, this issue is completely eliminated, ensuring smooth, dependable running and maximum reliability.

With its medium heat range (6) and non-projected insulator, the B6HS offers balanced thermal control — preventing fouling during short trips while maintaining ideal combustion under continuous use. The copper-core electrode ensures strong spark energy, stable ignition, and long service life.

Key Features:

• Genuine NGK B6HS short-reach spark plug
• Specifically suited to Porsche 356 & 912 engines with tight piston clearance
• 2.5 mm shorter electrode prevents piston contact and misfiring
• Medium heat range (6) for reliable performance in standard and mildly tuned engines
• Non-projected insulator for confined combustion chambers
• Copper-core electrode for efficient heat transfer and consistent ignition
• 14 mm × 1.25 thread, 12.7 mm reach, 21 mm spanner size
• M4 terminal type – fits standard ignition leads
• Sold each – 4 required per engine

Applications:

• Porsche 356 (1950–1965)
• Porsche 912 (1965–1969)
• VW Beetle 1200 – 1600
• VW Karmann Ghia 1200 – 1600
• VW Type 2 (Splitscreen & Baywindow)
• VW Type 3 (Notchback, Fastback, Squareback)
• Ideal for short-reach cylinder heads and tight-clearance piston designs

NGK Code Explained:

• B – 14 mm thread diameter
• 6 – Medium heat range (2 = hot, 10 = cold)
• H – 12.7 mm (½ inch) thread reach
• S – Standard design features

Specification:

• Thread size: M14 × 1.25
• Thread reach: 12.7 mm
• Spanner size: 21 mm
• Terminal type: M4
• Electrode core: Copper
• Quantity: Sold each