OT-Zeiger (Oberer Totpunkt) – Porsche 911 Porsche 993 Carrera 4 –

Porsche 993 Carrera 4 – 1994 to 1998

0L – 1977 to 1980

Porsche 987C Cayman S 3

Umfassender Kupplungs- und Schwungradsatz für Porsche 911 Modelle der Baujahre 1972 bis 1986 mit 915-Getriebe

OT-Zeiger (Oberer Totpunkt) – Porsche 911 Porsche 993 Carrera 4 –For maximum precision in ignition timing adjustment. Don't rely blindly on the pulley marking. This mechanical "piston stopper" helps you determine the true top dead center (TDC). Application: Screws into the spark plug hole. By carefully turning the engine against the stop (in both directions) and averaging the values on the degree wheel, the exact TDC is determined. Available for 12mm and 14mm spark plug threads.