Injection line set 911 K-jetronic from 1974 to 1980

Injection line set, for Porsche 911 with K-jetronic from 1974 to 1980.

OEM numbers:
Cylinder 1: 91111009311
Cylinder 2: 91111009311
Cylinder 3: 91111009311
Cylinder 4: 91111009312
Cylinder 5: 91111009312
Cylinder 6: 91111009312

the 1-3 are numbered consecutively to 91111009313 and the 4-6 to 91111009314