The rods are an H-beam billet made from 4340 material. They are heat treated, shot peened, mag particle inspected and finished to the tightest tolerances in the racing industry.
The bolts are a special bolt that is made to specifications by ARP from ARP2000 material. These are not an off the shelf type ARP bolt and because of some special features are truly an upgrade over what the other guys sell as an upgrade.
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