ARP Studs and nuts
Jaguar: Engines with long studs - E-Type 4.2 from October 1968: OTS and FHC models from engine no. 7R1915 and 2+2 models from 7R35388 • XJ6 4.2 Series I from engine no. 7L1176 to 7L66597 (October 1968 to October 1972)
cylinder head - 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.