Intake: 0.15 mm (0.006 in)
Exhaust: 0.25 mm (0.010 in)
1972-77 Opel Rekord 1900
1978-86 Opel Rekord 2000/20E/21E
Intake: 0.20 mm (0.008 in)
Exhaust: 0.35 mm (0.014 in)