ARP Studs and nuts
Mini: 1275 cc, not Cooper S MK1/2
Sprite / Midget: from October 1966 to October 1974 with 1275 cc engine - Sprite from HAN9-64735 to AAN10-87824, Midget from GAN4-52390 to GAN5-153920
main bearing caps. High grade 8470 chrome moly with a tensile strength of 190.000 psi ensure substantial strength and reduce stretching
ARP is one of the most renowned screw manufacturers for motorsport: well-known racing teams from Formula 1, Nascar and Indycar series trust the excellent quality.
The threads are rolled into high-strength steel. This non-cutting process does not interrupt the fibre flow, unlike thread cutting. On the contrary, the cold forming process hardens the structure of the surface.
The benefit lies in the high safety reserves of the most heavily loaded components in the engine.