ARP Con rod bolts with nuts

Jaguar: XK120, XK140 and XK150 (1949-61) • Mark I (1955-59) • Mark II (1959-69) • E-Type Series 1 and 2 (1961-70) • Mk5 (1948-51) • Mk7, Mk8 and Mk9 (1950-61) • Mk10 (1961-66) • 420G (1966-69) • S-Type 3.4 and 3.8 (1963-68) • 420 and Daimler Sovereign (1966-69) • XJ6 Series I, II and III (1968-87) • Daimler DS420 Limousine and Hearse (1968-92)

heavy duty version, use with original con rods. Tensile strength: 45-50 ft/lbs.
Made of high grade 8740 chrome moly steel and heat treated to a nominal tensile strength of 190.000 psi. Threads are rolled after heat treat to ensure optimum fatigue strength

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.