Spark plugs for heavy-duty supercharged engines. Two ground electrodes directly integrated into the shell for higher resistance to high pressure and high vibrations.

Replacement interval: see table below.

Highly resistant spark plugs mainly used for racing purposes. High resistance to vibrations and high pressures in the combustion chamber.

Explanation to the table:

* Custom production
P Sealing washer
K Sealing cone

Code	Code	Custom	Luz / Gap	Gasket/seal	Replacement Interval	key dimensions	thread length	thread	recommended tightening torque	Photo
DOR08DS	1799	*	0,65	P	max. 50 motohodin (Racing)	16 mm	19 mm	M 14x1,25	20-30 Nm
DOR10DS	1798	*	0,65	P	max. 50 motohodin (Racing)	16 mm	19 mm	M 14x1,25	20-30 Nm
DOR12DS	1719	*	0,65	P	max. 50 motohodin (Racing) / max. 20.000 km (Tuning)	16 mm	19 mm	M 14x1,25	20-30 Nm
DOR14DS	1720	*	0,65	P	max. 50 motohodin (Racing) / max. 20.000 km (Tuning)	16 mm	19 mm	M 14x1,25	20-30 Nm