PORSCHE 911 type 901 

The PORSCHE 911 type 901 category gathers engine parts for the air-cooled 2.0 to 2.7-litre flat-six, the original 911 generation (1963-1989). It carries a single active reference: the reinforced ARP-204-4206 head studs, rated notably for the 901 engine. ARP is the only established brand on this page. For pistons, connecting rods and bearings for the 901, see the dedicated engine code categories: 2.0L 12v - 901, 2.2L 12V - 911, 2.4L 12V - 911 and 2.7L 12V - 911.