AU5.225-1B ARP Head Stud – Nissan RD28T
AU5.225-1B is an ARP head stud for the Nissan RD28T engine and is used as a replacement for the original head bolts in applications with increased load, including higher boost pressure and performance builds where reliable cylinder head fastening is required.
This product is one single head stud. A complete head stud set for the RD28T can be assembled by purchasing 14 pcs AU5.225-1B, 14 pcs AR200-8537 washers and 14 pcs AR300-8337 nuts, corresponding to ARP’s recommended configuration.
Using ARP head studs provides more accurate clamping than original torque-to-yield bolts, reduces the risk of head gasket issues and allows repeated disassembly without loss of strength.
Specifications
Application Nissan RD28T engine
ARP part number AU5.225-1B
Type Head stud
Quantity per engine 14 pcs
Required accessories AR200-8537 washers and AR300-8337 nuts
Material ARP 8740 high-strength steel
Torque
Tighten in 3 stages
54 Nm
81 Nm
108 Nm
