Hi Octane billet main caps and brace suit RB25/26/30
For serious bottom end strength and block rigidity. Was fitted to RB30 but engine never used. Caps are machined from Billet 4140 High Tensile Steel and require custom equal length studs. The block needs to be drilled and tapped to suit. Tunnel boring required and other machining processes. Does not include Main Studs (Custom 12mm ARP-2000 Main Studs required.